3.5 Carat Cushion Lab Grown Diamond Prices Comparison
As of April 2026, 3.5 carat cushion lab grown diamonds usually range from $630 to $20,506, with an average price of $3,865.In the last month, prices for these diamonds are down 1.3%.Compare 1,641 verified listings across 12 retailers tracked by CaratRadar.
3.5 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 1,641 verified 3.5-carat cushion lab grown diamonds listed across 12 online retailers. Prices in this segment range from $630 to $20,506, with an average asking price of $3,865 and a median of $2,765.
The price spread of $19,876 (96.9% 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.
1,641 diamonds tracked in this segment
Price range: $630 to $20,506
Average price: $3,865
Median price: $2,765
Available across 12 retailers
Savings potential: up to 96.9%
Price Range Overview
As of Apr 14, 2026Real market range for this carat, shape, and diamond type.
1,641
$630
$3,865
$2,765
$20,506
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 85.3%GIA | 3.5ct | Cushion | E | VS2 | Excellent
From $1,535
Compare at $10,420
Save 71.7%GIA | 3.5ct | Cushion | D | IF | Excellent
From $6,686
Compare at $23,610
Save 77.6%GIA | 3.5ct | Cushion | F | VS2 | Excellent
From $2,065
Compare at $9,230
Save 70.4%GIA | 3.5ct | Cushion | E | VVS1 | Ideal
From $3,174
Compare at $10,720
Save 77.1%GIA | 3.5ct | Cushion | D | VVS1 | Excellent
From $3,230
Compare at $14,130
Save 31.7%GIA | 3.5ct | Cushion | F | VS2 | Ideal
From $3,763
Compare at $5,510
Save 66%GIA | 3.5ct | Cushion | D | VS1 | Excellent
From $3,991
Compare at $11,740
GIA | 3.5ct | Cushion | D | FL | Ideal
From $23,760
Compare at $23,890
Save 67.5%GIA | 3.5ct | Cushion | E | VVS2 | Ideal
From $2,753
Compare at $8,480
Save 81.9%IGI | 3.5ct | Cushion | G | VVS2 | Ideal
From $1,195
Compare at $6,600
Save 72.1%IGI | 3.5ct | Cushion | G | VS1 | Ideal
From $4,112
Compare at $14,740
Save 76.9%IGI | 3.5ct | Cushion | G | VS1 | Ideal
From $1,250
Compare at $5,420
Save 80.5%IGI | 3.5ct | Cushion | G | VS1 | Very Good
From $1,250
Compare at $6,400
Save 60.8%IGI | 3.5ct | Cushion | I | VS1 | Ideal
From $2,156
Compare at $5,500
Save 62.8%IGI | 3.5ct | Cushion | H | VS1 | Ideal
From $2,170
Compare at $5,840
Save 69.7%IGI | 3.5ct | Cushion | G | VS2 | Ideal
From $1,033
Compare at $3,410
Save 79.4%IGI | 3.5ct | Cushion | D | VS1 | Excellent
From $2,189
Compare at $10,610
Save 35.7%IGI | 3.5ct | Cushion | E | VVS1 | Excellent
From $1,890
Compare at $2,941
Save 55.2%IGI | 3.5ct | Cushion | D | VS2 | Very Good
From $1,585
Compare at $3,535
Save 78.4%IGI | 3.5ct | Cushion | F | VS1 | Excellent
From $1,865
Compare at $8,630
Save 75.1%IGI | 3.5ct | Cushion | F | VVS2 | Very Good
From $1,646
Compare at $6,600
Save 78%IGI | 3.5ct | Cushion | F | VS2 | Ideal
From $1,745
Compare at $7,930
Save 76.2%IGI | 3.5ct | Cushion | D | VS2 | Excellent
From $1,558
Compare at $6,540
Save 72.4%IGI | 3.5ct | Cushion | D | VVS1 | Ideal
From $3,766
Compare at $13,630
IGI | 3.5ct | Cushion | K | VS1 | Good
From $1,280
Save 58.2%IGI | 3.5ct | Cushion | D | VVS1 | Excellent
From $3,766
Compare at $9,006
IGI | 3.5ct | Cushion | D | VS1 | Ideal
From $8,310
Save 28.9%IGI | 3.5ct | Cushion | E | VS1 | Very Good
From $1,281
Compare at $1,802
Save 71.8%IGI | 3.5ct | Cushion | D | VVS1 | Ideal
From $3,184
Compare at $11,280
Save 75.2%IGI | 3.5ct | Cushion | D | SI1 | Very Good
From $1,698
Compare at $6,840
Save 58.2%IGI | 3.5ct | Cushion | D | VVS1 | Very Good
From $3,766
Compare at $9,006
Save 72.4%IGI | 3.5ct | Cushion | D | VVS1 | Ideal
From $3,766
Compare at $13,630
Save 81.1%IGI | 3.5ct | Cushion | F | VVS2 | Very Good
From $1,407
Compare at $7,440
Save 78.1%IGI | 3.5ct | Cushion | E | VS2 | Ideal
From $1,636
Compare at $7,460
IGI | 3.5ct | Cushion | E | VVS2 | Very Good
From $1,075
Compare at $1,080
Save 77.8%IGI | 3.5ct | Cushion | D | VS2 | Ideal
From $1,864
Compare at $8,400
Save 83.3%IGI | 3.5ct | Cushion | E | VS1 | Ideal
From $1,358
Compare at $8,130
Save 83.3%IGI | 3.5ct | Cushion | E | VS1 | Ideal
From $1,358
Compare at $8,130
Save 84%IGI | 3.5ct | Cushion | E | VVS2 | Ideal
From $975
Compare at $6,090
IGI | 3.5ct | Cushion | E | VVS1 | Ideal
From $2,301
Compare at $2,305
Save 80.6%IGI | 3.5ct | Cushion | E | VVS1 | Ideal
From $1,887
Compare at $9,750
Save 78.7%IGI | 3.5ct | Cushion | E | VVS2 | Ideal
From $1,670
Compare at $7,850
Save 58.2%IGI | 3.5ct | Cushion | D | VVS1 | Very Good
From $3,766
Compare at $9,006
Save 77%IGI | 3.5ct | Cushion | E | VVS2 | Ideal
From $1,547
Compare at $6,720
IGI | 3.5ct | Cushion | G | VVS2 | Very Good
From $1,070
Compare at $1,070
Save 33.9%IGI | 3.5ct | Cushion | E | VVS2 | Ideal
From $1,470
Compare at $2,225
Save 80.5%IGI | 3.5ct | Cushion | G | VS1 | Ideal
From $973
Compare at $4,990
Save 81.9%IGI | 3.5ct | Cushion | F | VS1 | Excellent
From $1,248
Compare at $6,880
Save 81.7%IGI | 3.5ct | Cushion | E | VS2 | Very Good
From $1,203
Compare at $6,570
Save 74.3%IGI | 3.5ct | Cushion | D | IF | Ideal
From $5,780
Compare at $22,500
Entry pricing in this category starts around $630.
What to Know When Shopping for 3.5 Carat Cushion Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $19,876 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 $2,765 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 1,641 comparable stones in this segment. Prices start around $630 and go up to $20,506.
Based on the latest market data, the average asking price is about $3,865 with a median around $2,765.
The observed spread is roughly $19,876 across tracked listings, which is about 96.9% 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 $2,765, 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 $19,876 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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