3.8 Carat Cushion Lab Grown Diamond Prices Comparison
As of April 2026, 3.8 carat cushion lab grown diamonds usually range from $690 to $27,804, with an average price of $4,746.In the last month, prices for these diamonds are down 0.8%.Compare 253 verified listings across 9 retailers tracked by CaratRadar.
3.8 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 253 verified 3.8-carat cushion lab grown diamonds listed across 9 online retailers. Prices in this segment range from $690 to $27,804, with an average asking price of $4,746 and a median of $3,830.
The price spread of $27,114 (97.5% 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.
253 diamonds tracked in this segment
Price range: $690 to $27,804
Average price: $4,746
Median price: $3,830
Available across 9 retailers
Savings potential: up to 97.5%
Price Range Overview
As of Apr 14, 2026Real market range for this carat, shape, and diamond type.
253
$690
$4,746
$3,830
$27,804
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 77.9%GCAL | 3.8ct | Cushion | E | VS1 | Excellent
From $1,737
Compare at $7,850
Save 77.7%GCAL | 3.8ct | Cushion | E | VVS2 | Excellent
From $1,835
Compare at $8,230
Save 77.7%GCAL | 3.8ct | Cushion | E | VVS2 | Excellent
From $1,835
Compare at $8,230
Save 62.7%GIA | 3.8ct | Cushion | D | IF | Excellent
From $8,790
Compare at $23,540
Save 61.1%GIA | 3.8ct | Cushion | D | VVS2 | Ideal
From $5,265
Compare at $13,530
Save 22.2%IGI | 3.8ct | Cushion | F | VS1 | Ideal
From $4,878
Compare at $6,270
Save 55.7%IGI | 3.8ct | Cushion | I | VS2 | Ideal
From $1,125
Compare at $2,540
Save 60.3%IGI | 3.8ct | Cushion | E | VVS1 | Ideal
From $2,613
Compare at $6,580
Save 79.5%IGI | 3.8ct | Cushion | F | VS1 | Excellent
From $1,898
Compare at $9,270
Save 73%IGI | 3.8ct | Cushion | E | SI1 | Very Good
From $1,108
Compare at $4,100
Save 80.4%IGI | 3.8ct | Cushion | E | VS1 | Ideal
From $1,473
Compare at $7,530
Save 70.1%IGI | 3.8ct | Cushion | E | VS2 | Ideal
From $1,417
Compare at $4,740
Save 73.4%IGI | 3.8ct | Cushion | D | IF | Ideal
From $6,695
Compare at $25,150
Save 71.3%IGI | 3.8ct | Cushion | E | VVS1 | Ideal
From $2,957
Compare at $10,320
Save 68%IGI | 3.8ct | Cushion | D | VVS1 | Good
From $3,935
Compare at $12,300
Save 81.3%IGI | 3.8ct | Cushion | E | VS1 | Ideal
From $1,473
Compare at $7,870
Save 63.5%IGI | 3.8ct | Cushion | E | VVS1 | Good
From $2,957
Compare at $8,100
Save 76.7%IGI | 3.8ct | Cushion | E | VVS1 | Ideal
From $2,470
Compare at $10,600
Save 73.5%IGI | 3.8ct | Cushion | D | IF | Very Good
From $6,261
Compare at $23,600
Save 63.6%IGI | 3.8ct | Cushion | D | VS1 | Very Good
From $3,279
Compare at $9,020
Save 68.8%IGI | 3.8ct | Cushion | D | VVS2 | Very Good
From $3,282
Compare at $10,530
Save 82%IGI | 3.8ct | Cushion | G | VVS1 | Ideal
From $1,468
Compare at $8,170
Save 80.4%IGI | 3.8ct | Cushion | E | VVS2 | Ideal
From $1,363
Compare at $6,970
Save 77.4%IGI | 3.8ct | Cushion | F | VVS1 | Excellent
From $2,105
Compare at $9,330
Save 24.6%IGI | 3.8ct | Cushion | E | VVS1 | Ideal
From $2,917
Compare at $3,869
Save 73.9%IGI | 3.8ct | Cushion | G | VS1 | Very Good
From $1,043
Compare at $4,000
Save 71.5%IGI | 3.8ct | Cushion | D | VVS1 | Ideal
From $2,652
Compare at $9,290
Save 71.4%IGI | 3.8ct | Cushion | D | VVS1 | Ideal
From $2,756
Compare at $9,650
Save 60.9%IGI | 3.8ct | Cushion | D | VVS1 | Ideal
From $2,735
Compare at $6,990
Save 75.2%IGI | 3.8ct | Cushion | E | VS1 | Very Good
From $1,854
Compare at $7,470
Save 73.6%IGI | 3.8ct | Cushion | E | VVS2 | Ideal
From $1,855
Compare at $7,030
Save 69.7%IGI | 3.8ct | Cushion | D | IF | Excellent
From $7,190
Compare at $23,703
Save 71.3%IGI | 3.8ct | Cushion | F | VVS2 | Very Good
From $3,072
Compare at $10,720
Save 70.8%IGI | 3.8ct | Cushion | G | VVS2 | Ideal
From $1,293
Compare at $4,430
Save 67.1%IGI | 3.8ct | Cushion | D | VVS2 | Very Good
From $2,933
Compare at $8,920
Save 74.2%IGI | 3.8ct | Cushion | F | VVS2 | Ideal
From $1,290
Compare at $5,000
Save 72.9%IGI | 3.8ct | Cushion | D | FL | Very Good
From $13,389
Compare at $49,450
Save 55.7%IGI | 3.8ct | Cushion | F | VS1 | Ideal
From $2,052
Compare at $4,630
Save 79.2%IGI | 3.8ct | Cushion | E | VVS2 | Very Good
From $1,615
Compare at $7,750
Save 66.8%IGI | 3.8ct | Cushion | E | VVS2 | Very Good
From $2,866
Compare at $8,640
Save 79.1%IGI | 3.8ct | Cushion | D | FL | Excellent
From $9,300
Compare at $44,600
Save 30%IGI | 3.8ct | Cushion | D | VVS2 | Very Good
From $1,250
Compare at $1,786
Save 29%IGI | 3.8ct | Cushion | E | VVS1 | Very Good
From $2,005
Compare at $2,825
Save 86.2%IGI | 3.8ct | Cushion | E | VS1 | Very Good
From $1,213
Compare at $8,810
Save 87.5%IGI | 3.8ct | Cushion | E | VVS2 | Excellent
From $1,030
Compare at $8,240
Save 30%IGI | 3.8ct | Cushion | D | VVS2 | Very Good
From $1,250
Compare at $1,786
Save 77%GCAL | 3.81ct | Cushion | F | VS1 | Excellent
From $1,725
Compare at $7,490
Save 59%GIA | 3.81ct | Cushion | D | VVS1 | Good
From $4,508
Compare at $11,007
Save 60%GIA | 3.81ct | Cushion | D | VVS1 | Excellent
From $4,508
Compare at $11,260
Save 66%IGI | 3.81ct | Cushion | D | VVS1 | Very Good
From $4,173
Compare at $12,280
Entry pricing in this category starts around $690.
What to Know When Shopping for 3.8 Carat Cushion Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $27,114 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 $3,830 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 253 comparable stones in this segment. Prices start around $690 and go up to $27,804.
Based on the latest market data, the average asking price is about $4,746 with a median around $3,830.
The observed spread is roughly $27,114 across tracked listings, which is about 97.5% 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 $3,830, 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 9 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 $27,114 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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