5.1 Carat Cushion Natural Diamond Prices Comparison
As of February 2026, 5.1 carat cushion natural diamonds usually range from $1,187 to $103,838, with an average price of $11,924.In the last month, prices for these diamonds are down 2.5%.Compare 22 verified listings across 4 retailers tracked by CaratRadar.
5.1 Carat Cushion Natural Diamond Market Overview
CaratRadar currently tracks 22 verified 5.1-carat cushion natural diamonds listed across 4 online retailers. Prices in this segment range from $1,187 to $103,838, with an average asking price of $11,924 and a median of $2,795.
The price spread of $102,651 (98.9% 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.
22 diamonds tracked in this segment
Price range: $1,187 to $103,838
Average price: $11,924
Median price: $2,795
Available across 4 retailers
Savings potential: up to 98.9%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
22
$1,187
$11,924
$2,795
$103,838
Price History
Price Comparison Matrix
Live Listings
See all listingsCompare current retailer offers for this exact segment and open any listing for full details.
GIASave 31.3%5.05ct | Cushion | D | VVS2 | Excellent
From $4,830
Compare at $7,027
GIASave 20.3%5.05ct | Cushion | G | SI1 | Good
From $94,274
Compare at $118,213
IGISave 87.8%5.05ct | Cushion | G | VVS2 | Very Good
From $1,215
Compare at $9,940
IGISave 59%5.06ct | Cushion | FANCY | VVS2 | Good
From $1,336
Compare at $3,258
IGISave 60.6%5.07ct | Cushion | F | VVS2 | Very Good
From $1,339
Compare at $3,397
IGISave 56.4%5.07ct | Cushion | E | VS1 | Good
From $2,281
Compare at $5,234
IGISave 62.1%5.07ct | Cushion | H | VVS1 | Very Good
From $1,455
Compare at $3,835
GIASave 31.5%5.09ct | Cushion | E | VVS2 | Excellent
From $5,057
Compare at $7,386
GIASave 56.4%5.09ct | Cushion | D | VS1 | Ideal
From $9,748
Compare at $22,380
IGISave 27.4%5.09ct | Cushion | G | VS1 | Very Good
From $1,526
Compare at $2,101
IGISave 61.5%5.09ct | Cushion | F | VVS2 | Very Good
From $1,313
Compare at $3,409
GIASave 32.5%5.09ct | Cushion | E | VVS2 | Excellent
From $4,249
Compare at $6,293
IGISave 57.6%5.1ct | Cushion | FANCY | VS1 | Good
From $1,842
Compare at $4,343
IGISave 53%5.1ct | Cushion | FANCY | VS1 | Very Good
From $1,707
Compare at $3,628
GIASave 31%5.11ct | Cushion | E | VVS1 | Excellent
From $5,886
Compare at $8,532
GIASave 64.7%5.11ct | Cushion | E | VVS2 | Ideal
From $4,498
Compare at $12,760
GIASave 53.3%5.11ct | Cushion | F | VS1 | Excellent
From $3,309
Compare at $7,078
GIASave 12.3%5.13ct | Cushion | D | VS1 | Excellent
From $103,838
Compare at $118,426
GIASave 31%5.13ct | Cushion | F | VS1 | Excellent
From $5,830
Compare at $8,445
IGISave 63.4%5.13ct | Cushion | FANCY | VS2 | Ideal
From $1,187
Compare at $3,243
IGISave 70.2%5.14ct | Cushion | E | VS2 | Very Good
From $1,238
Compare at $4,160
GIASave 32.7%5.15ct | Cushion | E | VVS2 | Excellent
From $4,373
Compare at $6,493
Entry pricing in this category starts around $1,187.
What to Know When Shopping for 5.1 Carat Cushion Natural Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $102,651 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 $2,795 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.
- Compare natural vs. lab-grown options for the same carat and shape. Lab-grown diamonds are chemically identical but often 30-50% less expensive.
- 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 22 comparable stones in this segment. Prices start around $1,187 and go up to $103,838.
Based on the latest market data, the average asking price is about $11,924 with a median around $2,795.
The observed spread is roughly $102,651 across tracked listings, which is about 98.9% 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 $2,795, 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 4 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 $102,651 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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Tracking Natural inventory for 5.1 carat Cushion diamonds.