1.8 Carat Cushion Natural Diamond Prices Comparison
As of May 2026, 1.8 carat cushion natural diamonds usually range from $982 to $25,623, with an average price of $10,991.In the last month, prices for these diamonds are down 0.5%.Compare 161 verified listings across 9 retailers tracked by CaratRadar.
1.8 Carat Cushion Natural Diamond Market Overview
CaratRadar currently tracks 161 verified 1.8-carat cushion natural diamonds listed across 9 online retailers. Prices in this segment range from $982 to $25,623, with an average asking price of $10,991 and a median of $10,759.
The price spread of $24,641 (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.
161 diamonds tracked in this segment
Price range: $982 to $25,623
Average price: $10,991
Median price: $10,759
Available across 9 retailers
Savings potential: up to 96.2%
Price Range Overview
As of May 29, 2026Real market range for this carat, shape, and diamond type.
161
$982
$10,991
$10,759
$25,623
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 29.9%GIA | 1.81ct | Cushion | K | SI1 | Excellent
From $2,891
Compare at $4,125
Save 41.5%GIA | 1.82ct | Cushion | J | SI2 | Excellent
From $3,279
Compare at $5,606
Save 26.9%GIA | 1.85ct | Cushion | K | SI1 | Very Good
From $3,452
Compare at $4,724
HRD | 1.81ct | Cushion | J | SI1 | Ideal
From $3,510
Compare at $3,542
Save 23.9%GIA | 1.81ct | Cushion | J | SI1 | Excellent
From $3,900
Compare at $5,127
Save 39.2%GIA | 1.83ct | Cushion | I | VS1 | Ideal
From $4,158
Compare at $6,839
Save 39.8%GIA | 1.81ct | Cushion | J | IF | Ideal
From $4,256
Compare at $7,072
HRD | 1.81ct | Cushion | I | VS2 | Excellent
From $4,480
Compare at $4,626
Save 26.6%GIA | 1.83ct | Cushion | J | VS2 | Very Good
From $4,597
Compare at $6,265
GIA | 1.81ct | Cushion | L | SI2 | Very Good
From $4,623
Compare at $4,908
Save 37.7%GIA | 1.81ct | Cushion | J | VS1 | Ideal
From $4,841
Compare at $7,774
Save 17.1%GIA | 1.81ct | Cushion | J | VVS2 | Very Good
From $5,215
Compare at $6,288
Save 23.5%GIA | 1.88ct | Cushion | I | SI1 | Very Good
From $5,367
Compare at $7,020
Save 14.9%GIA | 1.81ct | Cushion | J | VS1 | Excellent
From $5,482
Compare at $6,441
Save 37%GIA | 1.82ct | Cushion | I | SI1 | Excellent
From $5,535
Compare at $8,784
Save 24.8%GIA | 1.83ct | Cushion | J | VS1 | Ideal
From $5,788
Compare at $7,694
GIA | 1.81ct | Cushion | J | VVS2 | Excellent
From $5,840
Compare at $6,104
GIA | 1.82ct | Cushion | K | VS2 | Very Good
From $5,962
Compare at $6,165
Save 41.5%GIA | 1.86ct | Cushion | I | SI2 | Excellent
From $5,991
Compare at $10,234
Save 40.9%GIA | 1.83ct | Cushion | J | VVS2 | Excellent
From $6,008
Compare at $10,174
Save 39%GIA | 1.81ct | Cushion | J | VVS1 | Ideal
From $6,012
Compare at $9,863
Save 13.8%GIA | 1.81ct | Cushion | J | SI1 | Excellent
From $6,015
Compare at $6,979
GIA | 1.82ct | Cushion | J | VVS1 | Ideal
From $6,025
Compare at $6,430
GIA | 1.81ct | Cushion | J | SI1 | Ideal
From $6,095
Compare at $6,670
Save 26.8%GIA | 1.82ct | Cushion | I | VS2 | Ideal
From $6,160
Compare at $8,421
GIA | 1.81ct | Cushion | K | VS1 | Excellent
From $6,217
Compare at $6,430
Save 36.3%GIA | 1.82ct | Cushion | I | VVS2 | Very Good
From $6,245
Compare at $9,801
Save 35.1%GIA | 1.81ct | Cushion | H | SI1 | Excellent
From $6,344
Compare at $9,778
Save 20.9%GIA | 1.81ct | Cushion | H | VS2 | Ideal
From $6,431
Compare at $8,132
Save 35.1%GIA | 1.82ct | Cushion | I | VS1 | Excellent
From $6,577
Compare at $10,132
Save 23.9%GIA | 1.83ct | Cushion | I | VS1 | Excellent
From $6,584
Compare at $8,657
Save 24%GIA | 1.86ct | Cushion | I | VS2 | Excellent
From $6,603
Compare at $8,683
Save 27.3%GIA | 1.81ct | Cushion | H | SI2 | Excellent
From $6,632
Compare at $9,123
Save 24%GIA | 1.81ct | Cushion | H | VS2 | Ideal
From $6,650
Compare at $8,745
Save 39.8%GIA | 1.81ct | Cushion | H | VVS1 | Excellent
From $6,721
Compare at $11,165
GIA | 1.86ct | Cushion | J | VS2 | Excellent
From $6,725
Compare at $6,829
Save 35.6%GIA | 1.81ct | Cushion | I | VS1 | Excellent
From $6,736
Compare at $10,463
Save 41.1%GIA | 1.81ct | Cushion | H | VS2 | Excellent
From $6,743
Compare at $11,442
Save 41%GIA | 1.82ct | Cushion | F | VS1 | Ideal
From $6,762
Compare at $11,465
GIA | 1.81ct | Cushion | J | VVS1 | Ideal
From $6,805
Compare at $7,326
Save 17.8%GIA | 1.81ct | Cushion | J | VVS2 | Excellent
From $6,838
Compare at $8,314
GIA | 1.86ct | Cushion | J | SI2 | Good
From $6,931
Compare at $7,586
Save 14.7%GIA | 1.81ct | Cushion | I | VS2 | Good
From $6,994
Compare at $8,198
Save 14.2%GIA | 1.84ct | Cushion | H | VS2 | Excellent
From $7,020
Compare at $8,186
Save 27.6%GIA | 1.88ct | Cushion | K | SI2 | Excellent
From $7,086
Compare at $9,791
Save 36.8%GIA | 1.83ct | Cushion | E | SI1 | Excellent
From $7,170
Compare at $11,353
GIA | 1.82ct | Cushion | I | VS2 | Excellent
From $7,205
Compare at $7,829
Save 21.1%GIA | 1.81ct | Cushion | I | VS1 | Excellent
From $7,268
Compare at $9,211
Save 40.5%GIA | 1.81ct | Cushion | I | VS2 | Excellent
From $7,391
Compare at $12,421
Save 26.4%GIA | 1.81ct | Cushion | I | IF | Excellent
From $7,405
Compare at $10,060
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 $24,641 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 $10,759 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 161 comparable stones in this segment. Prices start around $982 and go up to $25,623.
Based on the latest market data, the average asking price is about $10,991 with a median around $10,759.
The observed spread is roughly $24,641 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 completed market data, the fair market benchmark is $10,991. The median price is $10,759, 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 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 $24,641 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.
1.7 Carat Cushion Natural Diamond Prices
1.9 Carat Cushion Natural Diamond Prices
1.6 Carat Cushion Natural Diamond Prices
2 Carat Cushion Natural Diamond Prices
1.5 Carat Cushion Natural Diamond Prices
2.1 Carat Cushion Natural Diamond Prices
1.4 Carat Cushion Natural Diamond Prices
1.8 Carat Round Natural Diamond Prices
1.8 Carat Oval Natural Diamond Prices
1.8 Carat Emerald Natural Diamond Prices
1.8 Carat Pear Natural Diamond Prices
1.8 Carat Princess Natural Diamond Prices
Tracking Natural inventory for 1.8 carat Cushion diamonds.