8.2 Carat Radiant Lab Grown Diamond Prices Comparison

As of May 2026, 8.2 carat radiant lab grown diamonds usually range from $680 to $24,319, with an average price of $5,714.In the last month, prices for these diamonds are down 2.9%.Compare 24 verified listings across 6 retailers tracked by CaratRadar.

Market Insights
Last updated: 2026-05-29

8.2 Carat Radiant Lab Grown Diamond Market Overview

CaratRadar currently tracks 24 verified 8.2-carat radiant lab grown diamonds listed across 6 online retailers. Prices in this segment range from $680 to $24,319, with an average asking price of $5,714 and a median of $4,067.

The price spread of $23,639 (97.2% from highest to lowest) highlights why comparing identical certified diamonds across multiple retailers matters. Two identical certified diamonds can differ by hundreds or even thousands of dollars depending on the retailer.

These figures are based on our latest daily market data, matched by certification lab and certificate number across retailers, so you are comparing the exact same diamond.

  • 24 diamonds tracked in this segment

  • Price range: $680 to $24,319

  • Average price: $5,714

  • Median price: $4,067

  • Available across 6 retailers

  • Savings potential: up to 97.2%

Price Range Overview

As of May 29, 2026
Spread $23,639

Real market range for this carat, shape, and diamond type.

$680$24,319
Tracked

24

Lowest

$680

Average

$5,714

Median

$4,067

Highest

$24,319

Price History

Price Comparison Matrix

Live Listings

See all listings

Compare current retailer offers for this exact segment and open any listing for full details.

IGI | 8.26ct | Radiant | H | SI1 | Ideal
Save 79.5%

IGI | 8.26ct | Radiant | H | SI1 | Ideal

From $1,233

Compare at $6,011

5 stores
IGI | 8.26ct | Radiant | F | VVS2 | Excellent
Save 74.4%

IGI | 8.26ct | Radiant | F | VVS2 | Excellent

From $1,436

Compare at $5,613

3 stores
IGI | 8.26ct | Radiant | F | VVS2 | Excellent
Save 79%

IGI | 8.26ct | Radiant | F | VVS2 | Excellent

From $1,561

Compare at $7,433

9 stores
IGI | 8.24ct | Radiant | E | VVS2 | Excellent
Save 71.7%

IGI | 8.24ct | Radiant | E | VVS2 | Excellent

From $1,693

Compare at $5,981

3 stores
IGI | 8.24ct | Radiant | E | VVS2 | Excellent
Save 71.5%

IGI | 8.24ct | Radiant | E | VVS2 | Excellent

From $1,709

Compare at $5,986

3 stores
IGI | 8.3ct | Radiant | F | VVS2 | Ideal
Save 69.5%

IGI | 8.3ct | Radiant | F | VVS2 | Ideal

From $1,772

Compare at $5,803

4 stores
IGI | 8.23ct | Radiant | G | VS1 | Excellent
Save 35.7%

IGI | 8.23ct | Radiant | G | VS1 | Excellent

From $1,845

Compare at $2,869

3 stores
IGI | 8.23ct | Radiant | G | VVS2 | Ideal
Save 69%

IGI | 8.23ct | Radiant | G | VVS2 | Ideal

From $1,915

Compare at $6,168

2 stores
IGI | 8.28ct | Radiant | F | VS2 | Ideal
Save 73.5%

IGI | 8.28ct | Radiant | F | VS2 | Ideal

From $2,144

Compare at $8,093

3 stores
IGI | 8.21ct | Radiant | F | VVS2 | Excellent
Save 79.5%

IGI | 8.21ct | Radiant | F | VVS2 | Excellent

From $2,414

Compare at $11,760

6 stores
IGI | 8.2ct | Radiant | F | VS1 | Very Good
Save 71.4%

IGI | 8.2ct | Radiant | F | VS1 | Very Good

From $3,779

Compare at $13,190

3 stores
IGI | 8.27ct | Radiant | F | VS1 | Very Good
Save 71.3%

IGI | 8.27ct | Radiant | F | VS1 | Very Good

From $3,811

Compare at $13,300

3 stores
IGI | 8.28ct | Radiant | F | VS1 | Very Good
Save 71.4%

IGI | 8.28ct | Radiant | F | VS1 | Very Good

From $3,815

Compare at $13,320

3 stores
IGI | 8.29ct | Radiant | F | VVS2 | Very Good
Save 71.3%

IGI | 8.29ct | Radiant | F | VVS2 | Very Good

From $3,820

Compare at $13,330

3 stores
IGI | 8.22ct | Radiant | FANCY | VS1 | Excellent
Save 76.7%

IGI | 8.22ct | Radiant | FANCY | VS1 | Excellent

From $4,567

Compare at $19,585

2 stores
IGI | 8.29ct | Radiant | FANCY | VVS2 | Excellent
Save 77.3%

IGI | 8.29ct | Radiant | FANCY | VVS2 | Excellent

From $4,643

Compare at $20,446

2 stores
IGI | 8.27ct | Radiant | E | VVS1 | Very Good
Save 72.1%

IGI | 8.27ct | Radiant | E | VVS1 | Very Good

From $4,999

Compare at $17,949

3 stores
IGI | 8.2ct | Radiant | E | VVS2 | Ideal
Save 41%

IGI | 8.2ct | Radiant | E | VVS2 | Ideal

From $5,897

Compare at $9,990

2 stores
IGI | 8.21ct | Radiant | E | VVS2 | Ideal
Save 40.9%

IGI | 8.21ct | Radiant | E | VVS2 | Ideal

From $5,911

Compare at $10,000

2 stores
IGI | 8.24ct | Radiant | F | VS1 | Very Good

IGI | 8.24ct | Radiant | F | VS1 | Very Good

From $6,139

Compare at $6,564

2 stores
IGI | 8.21ct | Radiant | E | FL | Ideal
Save 28.7%

IGI | 8.21ct | Radiant | E | FL | Ideal

From $52,828

Compare at $74,086

4 stores
GIA | 8.28ct | Radiant | D | IF | Excellent

GIA | 8.28ct | Radiant | D | IF | Excellent

From $54,896

Compare at $58,285

2 stores
IGI | 8.24ct | Radiant | D | IF | Ideal
Save 29%

IGI | 8.24ct | Radiant | D | IF | Ideal

From $61,266

Compare at $86,270

4 stores
GIA | 8.23ct | Radiant | F | FL | Ideal
Save 28.3%

GIA | 8.23ct | Radiant | F | FL | Ideal

From $63,017

Compare at $87,863

4 stores

Entry pricing in this category starts around $680.

What to Know When Shopping for 8.2 Carat Radiant Lab Grown Diamonds

  1. Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $23,639 or more.
  2. Focus on the 4Cs that matter most to you. Color and clarity grades drive price more than cut in many segments, but cut affects sparkle the most.
  3. The median price of $4,067 is a useful benchmark. If you see a deal significantly below this, verify the retailer's reputation and return policy.
  4. Consider eye-clean alternatives. Moving one clarity grade down (e.g., VS2 to SI1) can save 10-15% with no visible difference to the naked eye.
  5. Lab-grown diamonds offer excellent value. Ensure the stone comes with a GIA or IGI certificate confirming it is laboratory-grown.
  6. Check shipping, insurance, and return policies. The lowest sticker price is not always the best deal once you factor in total cost of purchase.
  7. Radiant cuts combine the elegance of emerald shapes with the brilliance of round cuts, offering good value per carat.

Frequently Asked Questions

We currently track 24 comparable stones in this segment. Prices start around $680 and go up to $24,319.

Based on the latest market data, the average asking price is about $5,714 with a median around $4,067.

The observed spread is roughly $23,639 across tracked listings, which is about 97.2% from highest to lowest offer in this bucket.

We refresh pricing data daily so these pages stay current with market changes.

Based on completed market data, the fair market benchmark is $5,714. The median price is $4,067, so offers between the median and fair benchmark can be reasonable, while reputable listings below the median may be especially competitive.

We currently track this stone category across 6 online retailers, giving you a broad view of the competitive landscape.

For most buyers, color differences below G are hard to detect once set in a ring. Clarity grades of VS2 and above are typically eye-clean. Prioritize cut quality for maximum brilliance, then balance color and clarity based on your budget.

Retailer pricing strategies, overhead costs, and margin targets all contribute. The exact certified diamond can differ by $23,639 across sellers, which is why direct certified-diamond comparison is essential.

We match diamonds across retailers by their certification lab and certificate number. This means the prices you see are for the exact same physical diamond, not just stones with similar specs. It is a true apples-to-apples comparison.

Diamond prices fluctuate based on supply and demand. Our data refreshes regularly so you can track trends over time. Use the price range on this page as a benchmark and compare it to historical averages when available.

Diamond Terminology

Carat
A unit of weight for diamonds equal to 200 milligrams. Larger carat weights are exponentially rarer, which is why prices increase non-linearly with size.
Cut
Refers to how well a diamond's facets interact with light. Cut quality ranges from Ideal to Poor and is the single biggest factor affecting a diamond's brilliance.
Color
Grades a diamond's lack of color on a scale from D (colorless) to Z (light yellow). Grades D-F are considered colorless; G-J are near-colorless and offer good value.
Clarity
Measures the presence of internal inclusions or surface blemishes. Grades range from Flawless (FL) to Included (I3). Most inclusions in VS2 and above are invisible to the naked eye.

Related Price Categories

Explore adjacent carat ranges and shapes to compare market shifts.

Tracking Lab Grown inventory for 8.2 carat Radiant diamonds.