1.5 Carat Cushion Lab Grown Diamond Prices Comparison
As of February 2026, 1.5 carat cushion lab grown diamonds usually range from $356 to $4,631, with an average price of $655.In the last month, prices for these diamonds are down 2.6%.Compare 5,785 verified listings across 12 retailers tracked by CaratRadar.
1.5 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 5,785 verified 1.5-carat cushion lab grown diamonds listed across 12 online retailers. Prices in this segment range from $356 to $4,631, with an average asking price of $655 and a median of $579.
The price spread of $4,275 (92.3% 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.
5,785 diamonds tracked in this segment
Price range: $356 to $4,631
Average price: $655
Median price: $579
Available across 12 retailers
Savings potential: up to 92.3%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
5,785
$356
$655
$579
$4,631
Price History
Price Comparison Matrix
Live Listings
See all listingsCompare current retailer offers for this exact segment and open any listing for full details.
IGISave 67.5%1.45ct | Cushion | F | VVS2 | Very Good
From $600
Compare at $1,850
IGISave 72.6%1.45ct | Cushion | F | VS2 | Very Good
From $538
Compare at $1,960
IGISave 72.9%1.45ct | Cushion | G | VS2 | Very Good
From $484
Compare at $1,790
IGISave 72.1%1.45ct | Cushion | G | VS1 | Ideal
From $584
Compare at $2,090
IGISave 73.4%1.45ct | Cushion | G | SI1 | Very Good
From $425
Compare at $1,600
IGISave 72.1%1.45ct | Cushion | G | VS1 | Ideal
From $584
Compare at $2,090
IGISave 72.5%1.45ct | Cushion | G | VVS2 | Very Good
From $550
Compare at $2,000
IGISave 71.8%1.45ct | Cushion | F | VS1 | Very Good
From $649
Compare at $2,300
IGISave 71.5%1.45ct | Cushion | E | VVS1 | Ideal
From $648
Compare at $2,270
IGISave 66.5%1.45ct | Cushion | D | VS2 | Excellent
From $654
Compare at $1,950
IGISave 72.9%1.45ct | Cushion | E | VS1 | Ideal
From $493
Compare at $1,820
IGISave 14.3%1.45ct | Cushion | D | VVS2 | Very Good
From $645
Compare at $752
IGISave 75.4%1.45ct | Cushion | E | VS1 | Ideal
From $494
Compare at $2,005
IGISave 67.9%1.45ct | Cushion | D | VVS2 | Ideal
From $570
Compare at $1,778
IGISave 58%1.45ct | Cushion | E | VVS2 | Ideal
From $1,150
Compare at $2,740
IGISave 67.9%1.45ct | Cushion | D | VVS2 | Ideal
From $570
Compare at $1,778
IGISave 71.5%1.45ct | Cushion | E | VS2 | Excellent
From $493
Compare at $1,730
IGISave 74.3%1.45ct | Cushion | D | VVS2 | Excellent
From $478
Compare at $1,860
IGISave 71.3%1.45ct | Cushion | D | VS2 | Very Good
From $476
Compare at $1,660
IGISave 77.6%1.45ct | Cushion | D | VS1 | Very Good
From $482
Compare at $2,150
IGISave 74.6%1.45ct | Cushion | E | VS1 | Ideal
From $487
Compare at $1,920
IGISave 78.3%1.45ct | Cushion | D | VVS2 | Ideal
From $572
Compare at $2,630
IGISave 77.2%1.45ct | Cushion | D | VVS1 | Ideal
From $520
Compare at $2,280
IGISave 80.3%1.45ct | Cushion | D | VVS1 | Ideal
From $510
Compare at $2,590
IGISave 46.2%1.45ct | Cushion | E | VS1 | Good
From $667
Compare at $1,240
IGISave 81.9%1.45ct | Cushion | D | IF | Excellent
From $872
Compare at $4,810
IGISave 79.4%1.45ct | Cushion | D | VVS1 | Good
From $654
Compare at $3,170
IGISave 73.3%1.45ct | Cushion | D | VVS2 | Ideal
From $627
Compare at $2,350
IGISave 68.6%1.45ct | Cushion | E | VS1 | Very Good
From $490
Compare at $1,560
IGISave 67.5%1.45ct | Cushion | F | VS1 | Ideal
From $595
Compare at $1,830
GIASave 81.9%1.45ct | Cushion | D | VVS2 | Excellent
From $675
Compare at $3,740
IGISave 72.9%1.45ct | Cushion | E | SI1 | Very Good
From $484
Compare at $1,790
IGISave 78.4%1.45ct | Cushion | D | VVS2 | Ideal
From $572
Compare at $2,650
IGISave 72.1%1.45ct | Cushion | F | VS1 | Very Good
From $566
Compare at $2,030
IGISave 72.1%1.45ct | Cushion | F | VS1 | Very Good
From $566
Compare at $2,030
IGISave 72.9%1.45ct | Cushion | G | VS2 | Very Good
From $484
Compare at $1,790
IGISave 72.5%1.45ct | Cushion | G | VVS2 | Very Good
From $550
Compare at $2,000
IGISave 72.7%1.45ct | Cushion | G | VS1 | Ideal
From $502
Compare at $1,840
IGISave 72.7%1.45ct | Cushion | G | VS1 | Ideal
From $502
Compare at $1,840
IGISave 71.8%1.45ct | Cushion | D | VS1 | Very Good
From $638
Compare at $2,260
IGISave 78.4%1.45ct | Cushion | E | VS1 | Very Good
From $513
Compare at $2,380
IGISave 56.6%1.45ct | Cushion | G | VS2 | Very Good
From $508
Compare at $1,170
IGISave 72.9%1.45ct | Cushion | G | VS2 | Very Good
From $484
Compare at $1,790
IGISave 72.1%1.45ct | Cushion | G | VVS2 | Very Good
From $589
Compare at $2,110
IGISave 51.3%1.45ct | Cushion | G | VVS2 | Very Good
From $589
Compare at $1,210
IGISave 72.6%1.45ct | Cushion | G | VS2 | Very Good
From $538
Compare at $1,960
IGISave 72.1%1.45ct | Cushion | G | VS1 | Ideal
From $584
Compare at $2,090
IGISave 72.6%1.45ct | Cushion | G | VS2 | Very Good
From $538
Compare at $1,960
IGISave 72.1%1.45ct | Cushion | G | VVS2 | Very Good
From $589
Compare at $2,110
IGISave 78.9%1.45ct | Cushion | D | VVS2 | Very Good
From $554
Compare at $2,630
Entry pricing in this category starts around $356.
What to Know When Shopping for 1.5 Carat Cushion Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $4,275 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 $579 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 5,785 comparable stones in this segment. Prices start around $356 and go up to $4,631.
Based on the latest market data, the average asking price is about $655 with a median around $579.
The observed spread is roughly $4,275 across tracked listings, which is about 92.3% 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 $579, 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 12 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 $4,275 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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