3.1 Carat Cushion Lab Grown Diamond Prices Comparison
As of February 2026, 3.1 carat cushion lab grown diamonds usually range from $627 to $21,260, with an average price of $1,771.In the last month, prices for these diamonds are down 1.6%.Compare 4,355 verified listings across 13 retailers tracked by CaratRadar.
3.1 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 4,355 verified 3.1-carat cushion lab grown diamonds listed across 13 online retailers. Prices in this segment range from $627 to $21,260, with an average asking price of $1,771 and a median of $1,223.
The price spread of $20,633 (97.1% 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.
4,355 diamonds tracked in this segment
Price range: $627 to $21,260
Average price: $1,771
Median price: $1,223
Available across 13 retailers
Savings potential: up to 97.1%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
4,355
$627
$1,771
$1,223
$21,260
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 52%3.05ct | Cushion | G | VS1 | Ideal
From $11,340
Compare at $23,624
IGISave 62.8%3.05ct | Cushion | H | VS2 | Ideal
From $3,790
Compare at $10,182
IGISave 73.1%3.05ct | Cushion | H | VVS2 | Ideal
From $3,110
Compare at $11,549
IGISave 79.4%3.05ct | Cushion | H | VS1 | Excellent
From $899
Compare at $4,370
IGISave 91.4%3.05ct | Cushion | G | VS1 | Ideal
From $1,059
Compare at $12,368
IGISave 81.4%3.05ct | Cushion | G | VS1 | Very Good
From $730
Compare at $3,930
GCALSave 79%3.05ct | Cushion | E | VVS1 | Excellent
From $2,265
Compare at $10,780
GIASave 44.5%3.05ct | Cushion | E | VS1 | Excellent
From $1,811
Compare at $3,260
GIASave 71.5%3.05ct | Cushion | E | VS1 | Excellent
From $2,683
Compare at $9,410
GIASave 67.4%3.05ct | Cushion | D | FL | Good
From $18,510
Compare at $56,810
GIASave 39.4%3.05ct | Cushion | D | IF | Ideal
From $10,144
Compare at $16,742
GIASave 32.6%3.05ct | Cushion | E | VS1 | Excellent
From $2,198
Compare at $3,260
GIASave 44.7%3.05ct | Cushion | D | VS1 | Excellent
From $1,885
Compare at $3,411
GIASave 81.2%3.05ct | Cushion | D | VVS1 | Good
From $1,986
Compare at $10,560
GIASave 57%3.05ct | Cushion | G | VS1 | Ideal
From $2,208
Compare at $5,140
GIASave 32.6%3.05ct | Cushion | E | VS1 | Excellent
From $2,198
Compare at $3,260
GIASave 49.6%3.05ct | Cushion | I | VS1 | Ideal
From $4,911
Compare at $9,740
GIASave 40.4%3.05ct | Cushion | H | VS1 | Ideal
From $4,330
Compare at $7,260
GIASave 55.9%3.05ct | Cushion | G | VS2 | Ideal
From $2,098
Compare at $4,760
GIASave 43.5%3.05ct | Cushion | E | VS1 | Excellent
From $1,841
Compare at $3,260
GIASave 72.8%3.05ct | Cushion | E | VVS2 | Good
From $2,044
Compare at $7,510
GIASave 80.9%3.05ct | Cushion | D | VVS1 | Excellent
From $2,003
Compare at $10,490
GIASave 43.5%3.05ct | Cushion | E | VS1 | Excellent
From $2,295
Compare at $4,060
GIASave 56.9%3.05ct | Cushion | D | VVS1 | Excellent
From $6,170
Compare at $14,320
GIASave 64.9%3.05ct | Cushion | E | VVS2 | Excellent
From $2,555
Compare at $7,279
GIASave 80%3.05ct | Cushion | E | VVS1 | Very Good
From $2,074
Compare at $10,370
GIASave 62.7%3.05ct | Cushion | D | IF | Excellent
From $10,195
Compare at $27,320
GIASave 84.9%3.05ct | Cushion | F | VVS2 | Ideal
From $1,442
Compare at $9,530
GIASave 32.6%3.05ct | Cushion | E | VS1 | Excellent
From $2,198
Compare at $3,260
GIASave 44.7%3.05ct | Cushion | D | VS1 | Excellent
From $1,885
Compare at $3,411
GIASave 65.8%3.05ct | Cushion | E | VVS1 | Excellent
From $2,897
Compare at $8,470
GIASave 43.8%3.05ct | Cushion | D | VS2 | Ideal
From $6,190
Compare at $11,020
IGISave 71.6%3.05ct | Cushion | H | VS1 | Ideal
From $1,214
Compare at $4,280
IGISave 52%3.05ct | Cushion | G | VS1 | Ideal
From $11,340
Compare at $23,624
IGISave 58.8%3.05ct | Cushion | G | VS2 | Ideal
From $4,760
Compare at $11,549
IGISave 31.4%3.05ct | Cushion | G | VS1 | Ideal
From $5,560
Compare at $8,107
IGISave 52%3.05ct | Cushion | G | VS1 | Very Good
From $11,340
Compare at $23,624
IGISave 69.9%3.05ct | Cushion | E | SI1 | Ideal
From $1,478
Compare at $4,910
GIASave 44.5%3.05ct | Cushion | E | VS1 | Excellent
From $1,811
Compare at $3,260
GIASave 81.1%3.05ct | Cushion | E | VVS2 | Excellent
From $1,877
Compare at $9,930
IGISave 83.9%3.05ct | Cushion | F | VS1 | Ideal
From $1,085
Compare at $6,758
IGISave 71.1%3.05ct | Cushion | H | VS1 | Ideal
From $2,219
Compare at $7,670
IGISave 76.4%3.05ct | Cushion | F | VS2 | Ideal
From $1,040
Compare at $4,410
IGISave 86%3.05ct | Cushion | D | VS1 | Very Good
From $2,985
Compare at $21,290
IGISave 82%3.05ct | Cushion | G | VS1 | Excellent
From $1,180
Compare at $6,558
IGISave 78.2%3.05ct | Cushion | E | VS1 | Ideal
From $1,426
Compare at $6,530
IGISave 49.8%3.05ct | Cushion | D | VS1 | Very Good
From $1,078
Compare at $2,147
IGISave 49.8%3.05ct | Cushion | D | VS1 | Very Good
From $1,078
Compare at $2,147
IGISave 49.8%3.05ct | Cushion | D | VS1 | Very Good
From $1,078
Compare at $2,147
IGISave 49.8%3.05ct | Cushion | D | VS1 | Very Good
From $1,078
Compare at $2,147
Entry pricing in this category starts around $627.
What to Know When Shopping for 3.1 Carat Cushion Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $20,633 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 $1,223 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 4,355 comparable stones in this segment. Prices start around $627 and go up to $21,260.
Based on the latest market data, the average asking price is about $1,771 with a median around $1,223.
The observed spread is roughly $20,633 across tracked listings, which is about 97.1% 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 $1,223, 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 13 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 $20,633 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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