1.8 Carat Cushion Natural Diamond Prices Comparison
As of April 2026, 1.8 carat cushion natural diamonds usually range from $982 to $25,617, with an average price of $11,092.In the last month, prices for these diamonds are down 0.9%.Compare 126 verified listings across 8 retailers tracked by CaratRadar.
1.8 Carat Cushion Natural Diamond Market Overview
CaratRadar currently tracks 126 verified 1.8-carat cushion natural diamonds listed across 8 online retailers. Prices in this segment range from $982 to $25,617, with an average asking price of $11,092 and a median of $10,865.
The price spread of $24,635 (96.2% 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.
126 diamonds tracked in this segment
Price range: $982 to $25,617
Average price: $11,092
Median price: $10,865
Available across 8 retailers
Savings potential: up to 96.2%
Price Range Overview
As of Apr 14, 2026Real market range for this carat, shape, and diamond type.
126
$982
$11,092
$10,865
$25,617
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 14.6%GIA | 1.81ct | Cushion | I | VVS2 | Good
From $8,051
Compare at $9,426
Save 21.6%GIA | 1.81ct | Cushion | G | SI1 | Excellent
From $9,650
Compare at $12,308
Save 22.4%GIA | 1.81ct | Cushion | G | SI1 | Excellent
From $9,127
Compare at $11,754
Save 21.5%GIA | 1.81ct | Cushion | J | VS2 | Excellent
From $8,242
Compare at $10,503
Save 24%GIA | 1.81ct | Cushion | H | VS2 | Ideal
From $6,650
Compare at $8,745
Save 13.3%GIA | 1.81ct | Cushion | F | VS1 | Excellent
From $14,391
Compare at $16,589
GIA | 1.81ct | Cushion | D | VVS2 | Excellent
From $11,498
Compare at $12,316
Save 22.7%GIA | 1.81ct | Cushion | G | VS2 | Ideal
From $8,364
Compare at $10,818
Save 32%GIA | 1.81ct | Cushion | K | VS1 | Excellent
From $4,762
Compare at $7,003
Save 15%GIA | 1.81ct | Cushion | I | VS2 | Good
From $7,314
Compare at $8,609
Save 35.4%GIA | 1.81ct | Cushion | J | IF | Ideal
From $4,978
Compare at $7,706
Save 25.3%GIA | 1.81ct | Cushion | I | VS2 | Excellent
From $7,458
Compare at $9,979
GIA | 1.81ct | Cushion | K | VS2 | Excellent
From $7,503
Compare at $7,886
Save 21%GIA | 1.81ct | Cushion | F | VS2 | Excellent
From $12,895
Compare at $16,328
GIA | 1.81ct | Cushion | F | VS1 | Ideal
From $11,963
Compare at $11,965
Save 17.5%GIA | 1.81ct | Cushion | I | VS1 | Excellent
From $7,678
Compare at $9,303
Save 22.3%GIA | 1.81ct | Cushion | J | VVS1 | Ideal
From $8,989
Compare at $11,574
Save 12.1%GIA | 1.81ct | Cushion | J | VVS1 | Ideal
From $6,738
Compare at $7,662
Save 13.6%GIA | 1.81ct | Cushion | D | VS2 | Excellent
From $12,020
Compare at $13,907
Save 33.6%GIA | 1.81ct | Cushion | L | VS1 | Ideal
From $2,629
Compare at $3,962
Save 36%GIA | 1.81ct | Cushion | E | VS1 | Excellent
From $8,105
Compare at $12,657
GIA | 1.81ct | Cushion | H | VVS2 | Excellent
From $9,340
Compare at $9,651
Save 19.3%GIA | 1.81ct | Cushion | D | VVS2 | Very Good
From $16,336
Compare at $20,236
Save 15.5%GIA | 1.81ct | Cushion | J | VS1 | Excellent
From $5,508
Compare at $6,517
Save 19%GIA | 1.81ct | Cushion | J | VVS2 | Excellent
From $5,780
Compare at $7,135
Save 21%GIA | 1.81ct | Cushion | H | VS1 | Excellent
From $12,158
Compare at $15,382
Save 20.9%GIA | 1.81ct | Cushion | G | SI1 | Excellent
From $11,849
Compare at $14,986
Save 22.3%GIA | 1.81ct | Cushion | M | VS2 | Ideal
From $2,509
Compare at $3,228
Save 21.7%GIA | 1.81ct | Cushion | H | VS2 | Excellent
From $10,362
Compare at $13,226
Save 25.8%GIA | 1.81ct | Cushion | D | VS2 | Good
From $12,922
Compare at $17,426
Save 27.5%GIA | 1.81ct | Cushion | J | VVS2 | Very Good
From $5,163
Compare at $7,120
Save 13.4%GIA | 1.81ct | Cushion | K | VS2 | Excellent
From $6,265
Compare at $7,230
Save 23.4%GIA | 1.81ct | Cushion | J | VS1 | Ideal
From $4,850
Compare at $6,335
Save 21.7%GIA | 1.81ct | Cushion | H | VS2 | Excellent
From $10,362
Compare at $13,226
GIA | 1.81ct | Cushion | G | SI1 | Excellent
From $8,817
Compare at $8,945
Save 22.4%GIA | 1.81ct | Cushion | I | VS2 | Excellent
From $9,214
Compare at $11,867
Save 21.6%GIA | 1.81ct | Cushion | G | SI1 | Excellent
From $10,200
Compare at $13,017
Save 24.7%GIA | 1.81ct | Cushion | J | SI1 | Excellent
From $3,858
Compare at $5,127
Save 19.8%GIA | 1.81ct | Cushion | F | VVS2 | Excellent
From $15,311
Compare at $19,102
Save 17.9%GIA | 1.81ct | Cushion | D | VS1 | Excellent
From $18,592
Compare at $22,633
Save 31%GIA | 1.81ct | Cushion | F | VVS2 | Excellent
From $13,724
Compare at $19,880
Save 12.7%GIA | 1.81ct | Cushion | G | VS1 | Good
From $15,279
Compare at $17,505
Save 36%GIA | 1.81ct | Cushion | H | VVS1 | Excellent
From $7,988
Compare at $12,474
GIA | 1.81ct | Cushion | I | VS1 | Ideal
From $8,370
Compare at $8,666
Save 36%GIA | 1.81ct | Cushion | E | VS1 | Excellent
From $7,283
Compare at $11,373
Save 21.5%GIA | 1.81ct | Cushion | I | SI1 | Excellent
From $8,284
Compare at $10,556
Save 21%GIA | 1.81ct | Cushion | F | VVS2 | Excellent
From $14,653
Compare at $18,541
Save 27.3%GIA | 1.81ct | Cushion | K | SI1 | Excellent
From $2,997
Compare at $4,125
Save 30.5%GIA | 1.81ct | Cushion | G | SI1 | Excellent
From $9,001
Compare at $12,960
Save 22.4%GIA | 1.81ct | Cushion | J | SI2 | Excellent
From $6,513
Compare at $8,397
Entry pricing in this category starts around $982.
What to Know When Shopping for 1.8 Carat Cushion Natural Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $24,635 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 $10,865 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 126 comparable stones in this segment. Prices start around $982 and go up to $25,617.
Based on the latest market data, the average asking price is about $11,092 with a median around $10,865.
The observed spread is roughly $24,635 across tracked listings, which is about 96.2% 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 $10,865, 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 8 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 $24,635 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 1.8 carat Cushion diamonds.