15 Carat Cushion Lab Grown Diamond Prices Comparison
As of April 2026, 15 carat cushion lab grown diamonds usually range from $3,090 to $55,775, with an average price of $17,150.In the last month, prices for these diamonds are down 6.4%.Compare 60 verified listings across 4 retailers tracked by CaratRadar.
15 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 60 verified 15-carat cushion lab grown diamonds listed across 4 online retailers. Prices in this segment range from $3,090 to $55,775, with an average asking price of $17,150 and a median of $14,219.
The price spread of $52,685 (94.5% 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.
60 diamonds tracked in this segment
Price range: $3,090 to $55,775
Average price: $17,150
Median price: $14,219
Available across 4 retailers
Savings potential: up to 94.5%
Price Range Overview
As of Apr 17, 2026Real market range for this carat, shape, and diamond type.
60
$3,090
$17,150
$14,219
$55,775
Price History
Price Comparison Matrix
Live Listings
See all listingsCompare current retailer offers for this exact segment and open any listing for full details.
Save 43.3%IGI | 15ct | Cushion | F | VS2 | Excellent
From $15,000
Compare at $26,450
Save 45.8%IGI | 15.01ct | Cushion | G | VS2 | Ideal
From $13,239
Compare at $24,410
Save 62.9%IGI | 15.01ct | Cushion | G | VS1 | Excellent
From $12,820
Compare at $34,510
Save 82.9%IGI | 15.01ct | Cushion | F | VS2 | Very Good
From $4,543
Compare at $26,520
Save 43.5%IGI | 15.01ct | Cushion | F | VVS2 | Excellent
From $15,208
Compare at $26,912
Save 75.3%IGI | 15.02ct | Cushion | I | SI1 | Ideal
From $3,960
Compare at $16,050
Save 56.9%IGI | 15.02ct | Cushion | F | VS1 | Very Good
From $4,105
Compare at $9,534
Save 60.3%IGI | 15.02ct | Cushion | F | VS1 | Ideal
From $16,060
Compare at $40,410
Save 59.3%IGI | 15.02ct | Cushion | F | SI1 | Ideal
From $10,829
Compare at $26,610
Save 58.1%IGI | 15.02ct | Cushion | F | VS2 | Very Good
From $4,895
Compare at $11,693
Save 60.3%IGI | 15.02ct | Cushion | F | VS1 | Excellent
From $16,060
Compare at $40,410
Save 63.5%IGI | 15.02ct | Cushion | F | VVS2 | Excellent
From $6,536
Compare at $17,894
Save 81.6%IGI | 15.02ct | Cushion | F | VVS2 | Very Good
From $6,160
Compare at $33,530
Save 68.3%IGI | 15.02ct | Cushion | F | VVS2 | Ideal
From $10,606
Compare at $33,480
Save 66.4%IGI | 15.02ct | Cushion | F | VS1 | Good
From $13,833
Compare at $41,140
Save 46.5%IGI | 15.02ct | Cushion | F | VVS2 | Very Good
From $7,605
Compare at $14,219
Save 83.7%IGI | 15.03ct | Cushion | G | VS1 | Ideal
From $4,320
Compare at $26,540
Save 67%IGI | 15.03ct | Cushion | G | VVS2 | Very Good
From $8,859
Compare at $26,820
Save 81%IGI | 15.03ct | Cushion | F | VVS2 | Very Good
From $6,373
Compare at $33,550
Save 80.6%IGI | 15.03ct | Cushion | F | VVS2 | Ideal
From $6,493
Compare at $33,550
Save 80.6%IGI | 15.03ct | Cushion | F | VVS2 | Ideal
From $6,493
Compare at $33,550
Save 83%IGI | 15.03ct | Cushion | G | VVS2 | Very Good
From $5,046
Compare at $29,730
Save 80.5%IGI | 15.03ct | Cushion | F | VVS2 | Very Good
From $6,553
Compare at $33,550
Save 49.8%IGI | 15.04ct | Cushion | G | VS1 | Ideal
From $14,699
Compare at $29,270
Save 77.5%IGI | 15.04ct | Cushion | E | VVS2 | Ideal
From $15,788
Compare at $70,100
Save 83.4%IGI | 15.04ct | Cushion | F | VS1 | Excellent
From $5,143
Compare at $30,980
Save 45.7%IGI | 15.04ct | Cushion | FANCY | VS2 | Very Good
From $16,208
Compare at $29,862
IGI | 15.04ct | Cushion | FANCY | VVS2 | Ideal
From $14,263
Compare at $26,278
Save 50.1%IGI | 15.05ct | Cushion | G | VS1 | Ideal
From $13,274
Compare at $26,580
Save 58.3%IGI | 15.05ct | Cushion | F | VVS2 | Very Good
From $5,235
Compare at $12,539
Save 53%IGI | 15.05ct | Cushion | E | VS1 | Ideal
From $15,446
Compare at $32,870
Save 81.7%IGI | 15.05ct | Cushion | F | VS1 | Ideal
From $5,685
Compare at $31,010
Save 81.8%IGI | 15.05ct | Cushion | F | VS1 | Ideal
From $5,659
Compare at $31,010
Save 71.1%IGI | 15.05ct | Cushion | F | VS1 | Very Good
From $8,954
Compare at $31,010
Save 50%IGI | 15.06ct | Cushion | G | VS1 | Ideal
From $13,283
Compare at $26,590
Save 83.7%IGI | 15.06ct | Cushion | F | VS2 | Ideal
From $4,330
Compare at $26,610
Save 56.9%IGI | 15.06ct | Cushion | E | VS2 | Very Good
From $3,990
Compare at $9,259
Save 56.9%IGI | 15.06ct | Cushion | E | VS2 | Very Good
From $4,115
Compare at $9,558
Save 48.9%IGI | 15.06ct | Cushion | G | VS2 | Ideal
From $13,602
Compare at $26,610
Save 67.1%IGI | 15.06ct | Cushion | G | VS1 | Very Good
From $8,091
Compare at $24,610
Save 81.6%IGI | 15.06ct | Cushion | F | VVS2 | Excellent
From $6,175
Compare at $33,620
Save 81%IGI | 15.06ct | Cushion | F | VVS2 | Excellent
From $6,386
Compare at $33,620
Save 78.3%IGI | 15.06ct | Cushion | E | VVS2 | Very Good
From $8,227
Compare at $37,860
Save 80.6%IGI | 15.06ct | Cushion | F | VVS2 | Very Good
From $6,506
Compare at $33,620
Save 72.3%IGI | 15.06ct | Cushion | G | VVS2 | Ideal
From $8,250
Compare at $29,790
Save 78.3%IGI | 15.07ct | Cushion | E | VVS2 | Excellent
From $8,232
Compare at $37,890
Save 82.5%IGI | 15.07ct | Cushion | F | VS1 | Very Good
From $5,446
Compare at $31,050
Save 80.6%IGI | 15.07ct | Cushion | F | VVS2 | Very Good
From $6,510
Compare at $33,640
Save 80.4%IGI | 15.07ct | Cushion | F | VVS2 | Very Good
From $6,587
Compare at $33,640
Save 57.1%IGI | 15.08ct | Cushion | F | VS1 | Very Good
From $4,415
Compare at $10,288
Entry pricing in this category starts around $3,090.
What to Know When Shopping for 15 Carat Cushion Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $52,685 or more.
- 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.
- The median price of $14,219 is a useful benchmark. If you see a deal significantly below this, verify the retailer's reputation and return policy.
- 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.
- Lab-grown diamonds offer excellent value. Ensure the stone comes with a GIA or IGI certificate confirming it is laboratory-grown.
- Check shipping, insurance, and return policies. The lowest sticker price is not always the best deal once you factor in total cost of purchase.
- Cushion cuts come in standard and modified brilliant varieties. Modified brilliants tend to show more fire, while standard cushions have broader facets.
Frequently Asked Questions
We currently track 60 comparable stones in this segment. Prices start around $3,090 and go up to $55,775.
Based on the latest market data, the average asking price is about $17,150 with a median around $14,219.
The observed spread is roughly $52,685 across tracked listings, which is about 94.5% from highest to lowest offer in this bucket.
We refresh pricing data daily so these pages stay current with market changes.
Based on our data, the median price is $14,219, which represents the midpoint of the market. Anything below this figure from a reputable retailer is a solid deal.
We currently track this stone category across 4 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 $52,685 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.
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