2.5 Carat Cushion Lab Grown Diamond Prices Comparison
As of July 2026, 2.5 carat cushion lab grown diamonds usually range from $314 to $8,739, with an average price of $1,835.In the last month, prices for these diamonds are down 1.3%.Compare 6,043 verified listings across 15 retailers tracked by CaratRadar.
2.5 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 6,043 verified 2.5-carat cushion lab grown diamonds listed across 15 online retailers. Prices in this segment range from $314 to $8,739, with an average asking price of $1,835 and a median of $1,261.
The price spread of $8,425 (96.4% 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.
6,043 diamonds tracked in this segment
Price range: $314 to $8,739
Average price: $1,835
Median price: $1,261
Available across 15 retailers
Savings potential: up to 96.4%
Price Range Overview
As of Jul 13, 2026Real market range for this carat, shape, and diamond type.
6,043
$314
$1,835
$1,261
$8,739
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 70.7%IGI | 2.51ct | Cushion | G | VS1 | Ideal
From $395
Compare at $1,348
Save 70.8%IGI | 2.52ct | Cushion | G | VS1 | Very Good
From $396
Compare at $1,354
Save 70.7%IGI | 2.53ct | Cushion | G | VS1 | Very Good
From $398
Compare at $1,359
Save 70.7%IGI | 2.53ct | Cushion | G | VS1 | Ideal
From $398
Compare at $1,359
Save 70.7%IGI | 2.5ct | Cushion | G | VS1 | Very Good
From $398
Compare at $1,360
Save 70.8%IGI | 2.54ct | Cushion | G | VS1 | Ideal
From $399
Compare at $1,365
Save 70.8%IGI | 2.51ct | Cushion | G | VS1 | Very Good
From $399
Compare at $1,366
IGI | 2.57ct | Cushion | G | VS1 | Very Good
From $400
Compare at $1,272
Save 70.8%IGI | 2.52ct | Cushion | G | VS1 | Very Good
From $400
Compare at $1,372
Save 70.8%IGI | 2.52ct | Cushion | G | VS1 | Very Good
From $400
Compare at $1,372
IGI | 2.57ct | Cushion | G | VS1 | Very Good
From $404
Compare at $1,272
Save 70.8%IGI | 2.54ct | Cushion | G | VS1 | Very Good
From $404
Compare at $1,383
Save 68.8%IGI | 2.59ct | Cushion | F | SI1 | Very Good
From $406
Compare at $1,301
Save 62.1%IGI | 2.59ct | Cushion | H | VS1 | Very Good
From $412
Compare at $1,088
Save 68.3%IGI | 2.59ct | Cushion | G | VS1 | Ideal
From $412
Compare at $1,299
Save 62.1%IGI | 2.59ct | Cushion | H | VS1 | Ideal
From $412
Compare at $1,088
Save 49.3%IGI | 2.5ct | Cushion | G | VS1 | Very Good
From $414
Compare at $816
Save 68.5%IGI | 2.59ct | Cushion | H | VS1 | Ideal
From $416
Compare at $1,319
Save 70.1%IGI | 2.51ct | Cushion | G | VS1 | Excellent
From $416
Compare at $1,391
IGI | 2.57ct | Cushion | G | VS1 | Very Good
From $417
Compare at $1,102
Save 49.6%IGI | 2.52ct | Cushion | G | VS1 | Very Good
From $417
Compare at $828
Save 70.1%IGI | 2.52ct | Cushion | G | VS1 | Very Good
From $417
Compare at $1,396
Save 61.7%IGI | 2.56ct | Cushion | G | VS1 | Very Good
From $419
Compare at $1,095
Save 49.8%IGI | 2.53ct | Cushion | G | VS1 | Very Good
From $419
Compare at $835
Save 70.1%IGI | 2.5ct | Cushion | G | VS1 | Very Good
From $419
Compare at $1,403
Save 48.7%IGI | 2.5ct | Cushion | G | VS1 | Very Good
From $419
Compare at $817
Save 68.7%IGI | 2.56ct | Cushion | G | VS1 | Excellent
From $419
Compare at $1,339
Save 70.2%IGI | 2.51ct | Cushion | G | VS1 | Very Good
From $420
Compare at $1,408
Save 70.2%IGI | 2.51ct | Cushion | G | VS1 | Very Good
From $420
Compare at $1,408
Save 49%IGI | 2.51ct | Cushion | G | VS1 | Very Good
From $420
Compare at $823
Save 62.4%IGI | 2.59ct | Cushion | G | VS1 | Very Good
From $420
Compare at $1,118
Save 62.4%IGI | 2.59ct | Cushion | G | VS1 | Very Good
From $420
Compare at $1,118
Save 68.6%IGI | 2.59ct | Cushion | G | VS1 | Very Good
From $420
Compare at $1,336
Save 62.4%IGI | 2.59ct | Cushion | G | VS1 | Very Good
From $420
Compare at $1,118
Save 68.6%IGI | 2.59ct | Cushion | G | VS1 | Very Good
From $420
Compare at $1,336
Save 62.4%IGI | 2.59ct | Cushion | G | VS1 | Ideal
From $420
Compare at $1,118
Save 62.4%IGI | 2.59ct | Cushion | G | VS1 | Excellent
From $420
Compare at $1,118
Save 69%IGI | 2.59ct | Cushion | G | VS1 | Excellent
From $420
Compare at $1,354
Save 61.8%IGI | 2.57ct | Cushion | G | VS1 | Very Good
From $421
Compare at $1,103
Save 49.9%IGI | 2.54ct | Cushion | G | VS1 | Very Good
From $421
Compare at $841
Save 70.2%IGI | 2.52ct | Cushion | G | VS1 | Very Good
From $421
Compare at $1,414
Save 70.2%IGI | 2.52ct | Cushion | G | VS1 | Very Good
From $421
Compare at $1,414
Save 49.2%IGI | 2.52ct | Cushion | G | VS1 | Very Good
From $421
Compare at $829
Save 49.2%IGI | 2.52ct | Cushion | G | VS1 | Ideal
From $421
Compare at $829
Save 49.9%IGI | 2.54ct | Cushion | G | VS1 | Excellent
From $421
Compare at $841
Save 50.2%IGI | 2.55ct | Cushion | G | VS1 | Ideal
From $422
Compare at $847
Save 70.1%IGI | 2.55ct | Cushion | G | VS1 | Very Good
From $422
Compare at $1,413
Save 50.2%IGI | 2.55ct | Cushion | G | VS1 | Ideal
From $422
Compare at $847
Save 68.6%IGI | 2.58ct | Cushion | G | VS1 | Very Good
From $423
Compare at $1,349
Save 70.3%IGI | 2.51ct | Cushion | G | VS1 | Very Good
From $424
Compare at $1,426
Entry pricing in this category starts around $314.
What to Know When Shopping for 2.5 Carat Cushion Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $8,425 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 $1,261 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 6,043 comparable stones in this segment. Prices start around $314 and go up to $8,739.
Based on the latest market data, the average asking price is about $1,835 with a median around $1,261.
The observed spread is roughly $8,425 across tracked listings, which is about 96.4% 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 $1,835. The median price is $1,261, 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 15 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 $8,425 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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