3.5 Carat Cushion Natural Diamond Prices Comparison
As of October 2026, 3.5 carat cushion natural diamonds in the 3.50–3.99 carat benchmark range usually range from $1,707 to $3,265,997, with an average price of $46,756.In the last month, prices for these diamonds are flat -0%.Compare 186 verified listings across 11 retailers tracked by CaratRadar.
3.5 Carat Cushion Natural Diamond Market Overview
CaratRadar currently tracks 186 verified 3.5-carat cushion natural diamonds in the 3.50–3.99 carat benchmark range, listed across 11 online retailers. Prices in this segment range from $1,707 to $3,265,997, with an average asking price of $46,756 and a median of $45,896.
The price spread of $3,264,290 (99.9% 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 use the same benchmark range throughout the page and 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.
186 diamonds tracked in the 3.50–3.99 carat benchmark
Price range: $1,707 to $3,265,997
Average price: $46,756
Median price: $45,896
Available across 11 retailers
Savings potential: up to 99.9%
Price Range Overview
As of Oct 14, 2026Real market range for this carat, shape, and diamond type.
186
$1,707
$46,756
$45,896
$3,265,997
Price History
Price Comparison Matrix
Live Listings
See all listingsCompare current retailer offers in the same benchmark range and open any listing for full details.
GIA | 3.52ct | Cushion | FANCY | VS1 | Good
From $10,832
Compare at $11,828
Save 40.1%GIA | 3.51ct | Cushion | L | VS1 | Excellent
From $11,482
Compare at $19,154
GIA | 3.51ct | Cushion | K | SI1 | Good
From $17,808
Compare at $19,340
GIA | 3.51ct | Cushion | K | SI2 | Excellent
From $19,400
Compare at $19,969
Save 19.7%GIA | 3.51ct | Cushion | J | SI2 | Ideal
From $19,782
Compare at $24,634
Save 25.7%GIA | 3.52ct | Cushion | L | SI1 | Excellent
From $20,121
Compare at $27,086
Save 18.3%GIA | 3.87ct | Cushion | L | SI1 | Excellent
From $20,962
Compare at $25,652
Save 17.1%GIA | 3.51ct | Cushion | K | SI2 | Very Good
From $21,258
Compare at $25,648
Save 23.8%GIA | 3.51ct | Cushion | K | VS1 | Excellent
From $21,339
Compare at $28,000
Save 17.1%GIA | 3.5ct | Cushion | K | SI2 | Excellent
From $21,428
Compare at $25,854
Save 17.1%GIA | 3.59ct | Cushion | K | SI2 | Excellent
From $21,535
Compare at $25,984
Save 17.9%GIA | 3.51ct | Cushion | J | SI1 | Very Good
From $22,477
Compare at $27,391
GIA | 3.51ct | Cushion | J | SI1 | Excellent
From $23,056
Compare at $23,339
Save 26.1%GIA | 3.56ct | Cushion | I | SI2 | Ideal
From $24,156
Compare at $32,708
Save 18%GIA | 3.81ct | Cushion | J | SI2 | Ideal
From $24,601
Compare at $29,993
Save 19.7%GIA | 3.57ct | Cushion | J | VS1 | Good
From $25,287
Compare at $31,485
GIA | 3.59ct | Cushion | J | SI2 | Good
From $25,310
Compare at $25,511
GIA | 3.52ct | Cushion | K | VS2 | Excellent
From $25,412
Compare at $27,367
Save 20.6%GIA | 3.5ct | Cushion | J | VS2 | Excellent
From $25,857
Compare at $32,550
Save 38.9%GIA | 3.53ct | Cushion | I | SI2 | Good
From $26,260
Compare at $42,965
GIA | 3.51ct | Cushion | J | SI1 | Excellent
From $26,600
Compare at $26,930
Save 23.8%GIA | 3.51ct | Cushion | J | VS1 | Excellent
From $27,097
Compare at $35,548
Save 18%GIA | 3.5ct | Cushion | J | SI1 | Good
From $27,211
Compare at $33,189
Save 18%GIA | 3.51ct | Cushion | J | SI2 | Ideal
From $27,250
Compare at $33,234
Save 18%GIA | 3.71ct | Cushion | K | VS2 | Ideal
From $27,576
Compare at $33,636
Save 26.4%GIA | 3.77ct | Cushion | J | SI2 | Very Good
From $27,681
Compare at $37,624
Save 20.5%GIA | 3.52ct | Cushion | H | VS2 | Very Good
From $27,757
Compare at $34,936
IGI | 3.56ct | Cushion | I | VVS2 | Ideal
From $27,990
Compare at $30,985
GIA | 3.51ct | Cushion | G | SI2 | Excellent
From $28,169
Compare at $29,720
Save 18.9%GIA | 3.5ct | Cushion | J | SI2 | Excellent
From $28,376
Compare at $35,006
GIA | 3.56ct | Cushion | I | SI1 | Very Good
From $28,615
Compare at $28,955
GIA | 3.51ct | Cushion | K | SI2 | Excellent
From $28,782
Compare at $31,729
Save 13.2%GIA | 3.5ct | Cushion | F | SI2 | Very Good
From $28,888
Compare at $33,292
Save 23.3%GIA | 3.52ct | Cushion | I | SI1 | Good
From $29,634
Compare at $38,658
GIA | 3.5ct | Cushion | I | SI2 | Excellent
From $30,148
Compare at $31,500
Save 17.1%GIA | 3.5ct | Cushion | J | SI2 | Excellent
From $30,229
Compare at $36,471
Save 15.6%GIA | 3.53ct | Cushion | J | IF | Very Good
From $30,766
Compare at $36,441
Save 17.1%GIA | 3.5ct | Cushion | J | VS1 | Very Good
From $31,109
Compare at $37,537
Save 14%GIA | 3.52ct | Cushion | J | VS2 | Ideal
From $31,130
Compare at $36,212
Save 20%GIA | 3.51ct | Cushion | I | SI2 | Excellent
From $31,282
Compare at $39,085
Save 19.1%GIA | 3.51ct | Cushion | K | VVS2 | Ideal
From $31,283
Compare at $38,651
GIA | 3.57ct | Cushion | J | VS2 | Excellent
From $31,794
Compare at $32,194
Save 10.7%GIA | 3.51ct | Cushion | J | VS2 | Excellent
From $32,000
Compare at $35,832
GIA | 3.5ct | Cushion | J | VVS1 | Excellent
From $32,829
Compare at $35,881
Save 24%GIA | 3.5ct | Cushion | I | SI1 | Excellent
From $32,879
Compare at $43,272
GIA | 3.5ct | Cushion | F | SI1 | Very Good
From $33,084
Compare at $34,015
Save 17.1%GIA | 3.5ct | Cushion | J | VS2 | Excellent
From $33,451
Compare at $40,373
Save 17.1%GIA | 3.55ct | Cushion | J | VVS1 | Ideal
From $33,560
Compare at $40,505
Save 20%GIA | 3.51ct | Cushion | J | SI1 | Excellent
From $34,111
Compare at $42,614
Save 21.2%GIA | 3.54ct | Cushion | D | SI2 | Excellent
From $34,684
Compare at $44,015
Entry pricing in this benchmark range starts around $1,707.
What to Know When Shopping for 3.5 Carat Cushion Natural Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $3,264,290 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 $45,896 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 186 comparable stones in the 3.50–3.99 carat benchmark range. Prices start around $1,707 and go up to $3,265,997.
Based on the latest market data, the average asking price is about $46,756 with a median around $45,896.
The observed spread is roughly $3,264,290 across tracked listings, which is about 99.9% from highest to lowest offer in the 3.50–3.99 carat benchmark range.
We refresh pricing data daily so these pages stay current with market changes.
Based on completed market data, the fair market benchmark is $46,756. The median price is $45,896, so offers between the median and fair benchmark can be reasonable, while reputable listings below the median may be especially competitive.
We currently track this stone category across 11 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 $3,264,290 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.
Related Price Categories
Explore adjacent carat ranges and shapes to compare market shifts.
3 Carat Cushion Natural Diamond Prices
3.5 Carat Round Natural Diamond Prices
3.5 Carat Oval Natural Diamond Prices
3.5 Carat Emerald Natural Diamond Prices
3.5 Carat Pear Natural Diamond Prices
3.5 Carat Radiant Natural Diamond Prices
3.5 Carat Heart Natural Diamond Prices
3.5 Carat Marquise Natural Diamond Prices
3.5 Carat Asscher Natural Diamond Prices
3.5 Carat Princess Natural Diamond Prices
Tracking Natural inventory for the 3.50–3.99 carat Cushion diamond benchmark.