Lab-Grown Green Diamond Price Guide: Cost by Carat & Ring Style

“How much does a lab-grown green diamond cost?” sounds like a simple question. It is not.

A loose diamond has one price. A finished ring combines the center diamond with metal, setting work, accent stones, sizing, finishing and service. Even the same Rosec design may show a price range because it is offered in different metals, including sterling silver, 10K, 14K and 18K gold.

That is why a single “price per carat” number can mislead a shopper. A two-carat solitaire in sterling silver may cost less than a one-carat bridal set in 18K gold. A five-carat ring can also appear at several very different prices when the design, metal weight and setting construction change.

This lab-grown green diamond price guide explains what shoppers are actually paying for. It uses current Rosec examples, a clear methodology and practical comparison rules rather than an unsupported percentage or one dramatic headline price.

For the broad category overview, read the complete lab-grown green diamond guide.

How This Lab-Grown Green Diamond Price Guide Was Created

Price content becomes unhelpful when the reader cannot see how the numbers were collected. Here is the method used for this article.

Review date July 14, 2026 Storefront and currency Rosec Jewels, United States storefront, USD Catalog reviewed The lab-grown green diamond collection, which displayed 98 products What the prices represent Finished jewelry—not loose center diamonds Product types considered Primarily rings; earrings and pendants were excluded from the ring-price summary Promotions Temporary cart discounts, financing costs, taxes, and time-limited gifts were not treated as permanent product value Important limitation Prices, inventory and selectable options can change. Always check the live product page.

This is a catalog snapshot, not an appraisal and not a prediction of future market value. It is designed to help a buyer understand why two finished rings can have different prices.

Current Rosec Price Range at a Glance

At the time of review, the lowest displayed base prices for selected lab-grown green diamond rings were around $729. The highest-priced ring found when the collection was sorted from high to low was a five-carat solitaire starting at $2,499 and showing a displayed variant range up to $4,169.

The collection also included:

• one-carat solitaire rings beginning around $729 to $749,
• two-carat solitaire and emerald-cut rings beginning around $729 to $769,
• three-carat emerald-cut and solitaire designs beginning around $749 to $799,
• four-carat designs beginning around $759 to $889, and
• five-carat designs beginning at very different points—from selected simpler styles around $749 to premium solitaire designs above $2,000.

Those numbers immediately show why carat weight cannot be used alone. The selected metal, setting style, amount of accent jewelry, product construction and exact center-stone specification can matter as much as the headline carat.

Dated Rosec Price Examples by Carat and Design

The examples below were visible on July 14, 2026. They are included to show how design and metal choices affect the displayed range. They are not permanent price promises.

Example Listed center Displayed price range Why it is useful Round solitaire ring 1 carat, Vivid Green–VS1 About $729–$1,529 A simple baseline design offered from sterling silver through 18K gold Marquise solitaire ring Approximately 1 carat About $749–$1,739 Shows how shape and setting can change the price from a round baseline Two-carat peg-head solitaire 2 carats, Vivid Green–VS1 About $729–$1,699 Demonstrates that a larger carat can share a similar base price when design and base metal differ Two-carat emerald-cut ring 2 carats, Vivid Green–VS1 About $769–$1,769 Useful for comparing shape while holding carat and listed quality relatively close Three-carat emerald-cut ring 3 carats, Vivid Green–VS1 About $769–$1,849 Shows why size alone does not create a linear finished-ring price Princess-cut bridal set 1-carat green center with a two-ring design About $939–$2,889 Shows the cost effect of an additional wedding band, accent stones, and more metal Premium five-carat solitaire 5 carats, VS1 About $2,499–$4,169 Illustrates the upper end of the reviewed Rosec ring collection

The same product pages list several metal options. For example, the one-carat round solitaire is available in sterling silver, 10K gold, 14K gold, and 18K gold. This is one reason the exact selected price can differ from the first number shown on a collection card.

Why Can One Ring Show a Wide Price Range?

A range does not necessarily mean the retailer is unsure of the price. It usually means the product has selectable variants.

For a made-to-order ring, the price may change because of:

• sterling silver versus gold,
• 10K versus 14K versus 18K gold,
• yellow versus white gold when alloy or production costs differ,
• ring size when substantially more metal is required,
• selected center-stone or total-carat variant,
• additional wedding band or enhancer, and
• temporary promotions or catalog updates.

Never quote the lowest number without stating the metal and configuration. Likewise, do not compare one retailer’s silver price with another retailer’s 18K-gold price and conclude that one diamond is dramatically cheaper.

How Does Carat Weight Affect the Price?

Carat is the diamond’s weight. More weight often increases the center stone’s cost, but finished Rosec prices do not rise in a perfectly straight line from one carat to five carats.

Why?

• Two stones with the same weight can have different measurements.
• A different shape can use the rough crystal differently.
• Color quality may differ.
• One ring may be a simple solitaire while another is a bridal set.
• The base price may use a different metal.
• Inventory, sourcing, and product positioning can vary.

A three-carat emerald-cut Rosec ring was displayed from about $769, close to the two-carat emerald-cut design at about $769. This does not prove that the extra carat is “free.” It proves that a finished-product card is not a controlled loose-diamond comparison.

To compare carat fairly, hold the following factors as close as possible: shape, complete color description, clarity, treatment history, metal, setting, and review date.

The future Rosec carat-size guide should explain face-up dimensions and hand coverage in detail. This price article keeps the discussion limited to cost so the pages do not compete.

How Does Green Color Affect the Price?

In fancy-colored diamonds, color is a major quality and value factor. GIA explains that color is the dominant value factor for fancy-color diamonds and that size and shape can influence how much color a diamond displays.

For a lab-grown green diamond, examine:

• Hue: whether the stone is green, yellow-green, blue-green, gray-green or another documented variation.
• Tone: whether it appears light, medium or dark.
• Saturation: how weak or strong the green appears.
• Distribution: whether the color looks even or zoned.
• Face-up performance: how the green appears when the stone is moving.

Do not assume that every product using the words “Vivid Green” should have the same price. Shape, measurements, clarity, report comments, and real appearance still differ.

The Rosec color-grading guide owns the full explanation of Fancy, Intense, Vivid, tone, and saturation.

How Does Diamond Shape Affect the Price?

To compare color display, bow ties, windowing, visible spread, and protection needs, use the best shapes for lab-grown green diamonds guide.

Rosec’s green-diamond collection included round, cushion, emerald, marquise, oval and princess shapes at the time of review.

Shape can influence price through:

• availability of suitable grown rough,
• yield during cutting,
• difficulty of producing an attractive outline,
• color concentration,
• labor needed to protect points and corners, and
• demand for a particular style.

GIA notes that the larger a diamond is—or the deeper its pavilion—the farther light can travel inside it, which can affect the strength of face-up color. This is one reason shape and cutting cannot be separated completely from color.

Do not conclude that one shape is always cheapest. Compare actual products with the same metal, similar carat and similar report characteristics.

How Does Clarity Affect the Price?

Higher clarity can influence price, but a fancy-color buyer should not chase clarity letters while ignoring color and cutting.

GIA’s fancy-color buying guidance notes that attractive color can remain the dominant factor even when a diamond has inclusions. However, inclusions that threaten durability can reduce value.

Many Rosec green-diamond product examples reviewed for this guide were listed as VS1. A buyer should still ask:

• Is the diamond eye-clean at normal viewing distance?
• Is an inclusion located under the center?
• Is anything close to a marquise or princess-cut point?
• Does the inclusion affect transparency or sparkle?

A VVS label is not automatically the best use of budget when a VS diamond looks equally clean to the unaided eye. Rosec’s broader clarity content should own the full clarity-scale explanation.

Does As-Grown or Post-Growth-Treated Status Affect Price?

It can, but there is no universal percentage.

An as-grown stone may receive a premium when its exact green shade, size, and shape are less available or when a customer values the report statement showing no indication of post-growth treatment. A post-growth-treated diamond may offer a stronger color or more selection at another price.

Price must still be compared using similar specifications. Do not compare a one-carat as-grown solitaire in silver with a three-carat post-growth-treated bridal set in 18K gold.

Use the as-grown versus post-growth-treated lab-grown green diamond guide for the full buying decision. Use the separate growth, irradiation, and annealing guide for the science.

How Do Settings and Side Stones Affect Price?

For protection, color visibility, maintenance, ring height and wedding-band planning, use the lab-grown green diamond setting guide.

The center diamond is only one part of the finished ring.

A simple solitaire normally uses less metal and fewer stones than:

• a halo ring,
• a hidden-halo design,
• a three-stone ring,
• a pavé band,
• a bridal set, or
• a ring with an enhancer.

The one-carat Rosec princess-cut bridal set reviewed for this guide began around $939 and showed a range up to approximately $2,889. Its center is smaller than some lower-priced solitaires, but the product includes a more complex two-ring construction.

This is why the question “How much is a one-carat green diamond?” should be separated from “How much is a one-carat green diamond bridal set?”

The future settings guide should compare security, color contrast, maintenance and wedding-band fit. This article discusses settings only as a price component.

How Does Metal Change the Final Price?

For color contrast, karat, alloy, plating and maintenance, use the lab-grown green diamond metal guide.

Metal is one of the clearest reasons a product card shows a range.

Rosec product pages reviewed for this guide offered options including:

• 92.5 sterling silver,
• 10K yellow or white gold,
• 14K yellow or white gold, and
• 18K yellow or white gold.

A higher-karat gold selection generally contains more gold than a lower-karat option. The amount of metal used also changes with the ring’s width, profile, size and number of components.

When comparing two prices, write the metal beside the number:

“$729 in sterling silver” is useful.

“This ring costs $729” may be incomplete when the same design has several metal options.

Why Price per Carat Can Mislead

Price per carat can be useful when comparing loose diamonds with very similar specifications. It is much less useful for finished rings.

Here is the basic problem:

Finished ring price = center diamond + accent stones + metal + setting labor + finishing + grading/documentation + retailer services.

Dividing that entire number by the center-stone carat weight pretends that the metal, side stones and craftsmanship cost nothing.

For example, a one-carat bridal set may have a higher total price than a two-carat solitaire because it contains another ring, more accent stones and more metal. Calling the bridal set “more expensive per carat” does not explain where the money went.

Use price per carat only when:

• the comparison is for loose center diamonds,
• the color descriptions are closely matched,
• the shapes and measurements are comparable,
• the clarity and treatment histories are similar, and
• the prices were collected at the same time.

How to Shop for a Lab-Grown Green Diamond Ring by Budget

After setting the budget, use the lab-grown green diamond engagement ring guide to choose the shape, setting, metal and profile.

Budget around $750–$1,000

Look first at selected solitaire rings in sterling silver and simpler gold configurations. At the time of review, several one- to five-carat product cards began within this area, but the exact metal and availability must be checked.

Prioritize:

• a verifiable IGI report,
• a color you like in real video,
• a secure setting, and
• clear metal disclosure.

Budget around $1,000–$2,000

This range can open more gold options, larger center stones and more detailed settings. Compare whether your extra budget improves the metal, center diamond, side stones or all three.

Budget around $2,000–$3,000

This area includes selected bridal sets, larger solitaires, side-stone designs and higher-karat variants. Do not assume the largest center is automatically the best purchase; check the complete construction.

Budget above $3,000

At the time of review, the upper part of the collection included premium five-carat solitaires and elaborate bridal configurations. Ask for complete product specifications, actual-stone media and written policy information before purchasing.

Budget sections are not product recommendations or guarantees of availability. They are a way to organize the live catalog.

Browse current options in the Rosec Jewels lab-grown green diamond ring collection.

How to Compare Two Green Diamond Ring Prices Fairly

Use this twelve-point comparison:

1. Same review date
2. Same currency
3. Same product type: ring versus ring
4. Same metal and karat
5. Similar center-stone carat
6. Similar face-up measurements
7. Same or closely related shape
8. Complete green color description
9. Similar clarity
10. Same treatment-history category where relevant
11. Comparable setting and accent-stone weight
12. Comparable return, resizing, warranty and service terms

If several items differ, you are not comparing the same product. That does not make the comparison useless, but it explains why the prices differ.

Green Diamond Price Red Flags

Pause before purchasing when:

• the seller gives a huge percentage saving without showing comparable stones,
• the price excludes the setting but the page looks like a finished-ring offer,
• the lowest price requires a different metal than the image suggests,
• the IGI report is missing or cannot be verified,
• the product title and report disagree about carat or color,
• the only visual is a computer render,
• the price is described as an investment opportunity,
• the return or resizing conditions are hidden, or
• the comparison uses a temporary sale against another retailer’s regular price.

For help interpreting Vivid Green, VS1 and IGI information, use the color grading and IGI guide.

Frequently Asked Questions

1. How much does a one-carat lab-grown green diamond ring cost?

   In Rosec’s U.S. collection reviewed on July 14, 2026, selected one-carat solitaire rings began around $729 to $749. Displayed ranges extended higher as the metal and design changed. Always check the live configuration.

2. How much does a two-carat lab-grown green diamond ring cost?

   Selected two-carat Rosec solitaire and emerald-cut rings began around $729 to $769 in the reviewed snapshot. Gold variants, side stones and more complex designs increased the displayed price.

3. How much does a three-carat lab-grown green diamond ring cost?

   Selected three-carat Rosec products began around $749 to $799, while premium lotus-basket and more complex styles began above $1,600. The design and metal must be compared with the carat.

4. How much does a five-carat lab-grown green diamond ring cost?

   Five-carat Rosec product cards showed a very wide range. Selected simpler designs began below $1,000, while a premium five-carat solitaire began around $2,499 and displayed variants up to approximately $4,169.

5. Why can a larger diamond ring cost less than a smaller one?

   The larger ring may use a simpler setting or lower-priced base metal, while the smaller ring may be a bridal set with more gold and accent stones. The headline carat is not the complete product.

6. Does Fancy Vivid Green always cost more?

   Strong color can influence value, but the complete price also depends on hue, tone, distribution, shape, clarity, carat, treatment history, setting and metal. “Vivid” alone does not create one fixed price.

7. Does an as-grown green diamond cost more than a treated one?

   Not automatically. Availability and buyer preference can affect pricing, but no universal premium should be assumed. Compare closely matched stones using their reports.

8. Why does the Rosec product card show two prices?

   The product may have selectable variants. Rosec pages reviewed for this guide offered metals from sterling silver through 18K gold, so the selected configuration can change the price.

9. Is the lowest displayed price the price of the diamond alone?

   No. The reviewed Rosec pages are finished-jewelry pages. The displayed price covers the selected ring configuration, not a separate loose-diamond listing.

10. Is an IGI report an appraisal?

    No. An IGI report documents gemological characteristics and identification. It should not be treated as a guaranteed retail, insurance or resale valuation.

11. Will a lab-grown green diamond ring hold its value?

    No seller can guarantee future resale value. Secondary-market prices can change with supply, demand, condition, documentation and buyer policies. Purchase primarily for the ring’s beauty, quality and use.

12. How often should this price guide be updated?

    A current commercial price guide should be reviewed at least quarterly and whenever the catalog, metal prices, product configurations or promotional structure changes substantially.

Final Thoughts

The honest answer to “How much is a lab-grown green diamond?” begins with another question:

Are we pricing a loose diamond, a solitaire ring, a halo, a bridal set or a premium gold configuration?

In Rosec’s July 14, 2026 catalog snapshot, selected finished rings began around $729, while premium and elaborate configurations extended above $4,000. Those numbers are useful only when the center stone, metal, setting and product type are stated together.

The best value is not automatically the lowest price or the largest carat. It is the ring whose report is clear, color looks beautiful in real media, construction fits the wearer and complete price makes sense.

Explore the live Rosec Jewels lab-grown green diamond collection and compare the exact metal and configuration before relying on any price shown in this dated guide.

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Sources and Editorial References

These resources support the grading and price-factor explanations in this guide. External links are marked nofollow and open in a new tab.

• GIA: Fancy Color Diamond Quality Factors
• GIA: Fancy Color Diamond Buyer’s Guide
• IGI: Fancy Colored Diamond Report
• IGI: Report Verification