1.8 Carat Cushion Natural Diamond Prices Comparison
As of February 2026, 1.8 carat cushion natural diamonds usually range from $536 to $30,315, with an average price of $9,938.In the last month, prices for these diamonds are down 1.4%.Compare 252 verified listings across 7 retailers tracked by CaratRadar.
1.8 Carat Cushion Natural Diamond Market Overview
CaratRadar currently tracks 252 verified 1.8-carat cushion natural diamonds listed across 7 online retailers. Prices in this segment range from $536 to $30,315, with an average asking price of $9,938 and a median of $9,736.
The price spread of $29,779 (98.2% 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.
252 diamonds tracked in this segment
Price range: $536 to $30,315
Average price: $9,938
Median price: $9,736
Available across 7 retailers
Savings potential: up to 98.2%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
252
$536
$9,938
$9,736
$30,315
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 40.1%1.75ct | Cushion | H | VVS2 | Excellent
From $11,150
Compare at $18,601
GIA1.75ct | Cushion | E | SI2 | Excellent
From $7,111
Compare at $7,349
GIASave 38.7%1.75ct | Cushion | G | VVS1 | Excellent
From $10,670
Compare at $17,402
GIASave 38.9%1.75ct | Cushion | F | VS1 | Excellent
From $13,480
Compare at $22,069
GIA1.75ct | Cushion | E | VS1 | Ideal
From $10,586
Compare at $10,970
1.75ct | Cushion | H | VS2 | Ideal
From $9,590
Compare at $9,952
GIA1.75ct | Cushion | F | VVS2 | Excellent
From $19,005
Compare at $19,314
GIASave 21.4%1.75ct | Cushion | F | VVS1 | Excellent
From $14,030
Compare at $17,854
GIA1.75ct | Cushion | H | VS1 | Excellent
From $13,312
Compare at $13,415
GIASave 17.9%1.75ct | Cushion | E | VS2 | Excellent
From $11,138
Compare at $13,570
GIA1.75ct | Cushion | H | VS2 | Very Good
From $11,846
Compare at $11,882
GIASave 36%1.75ct | Cushion | D | SI1 | Excellent
From $6,416
Compare at $10,018
GIASave 32.5%1.75ct | Cushion | G | VVS2 | Excellent
From $13,123
Compare at $19,440
GIASave 29.8%1.75ct | Cushion | J | SI1 | Excellent
From $5,358
Compare at $7,636
GIASave 37.8%1.75ct | Cushion | H | VS1 | Very Good
From $10,780
Compare at $17,329
GIASave 29.5%1.75ct | Cushion | J | VS1 | Excellent
From $3,858
Compare at $5,476
GIASave 14.7%1.75ct | Cushion | F | VS1 | Excellent
From $14,310
Compare at $16,767
IGISave 63%1.75ct | Cushion | FANCY | VS2 | Excellent
From $561
Compare at $1,517
IGISave 80.2%1.75ct | Cushion | FANCY | VS1 | Excellent
From $801
Compare at $4,040
IGISave 60.5%1.75ct | Cushion | FANCY | VS1 | Ideal
From $728
Compare at $1,842
GIASave 22.7%1.75ct | Cushion | G | VS1 | Excellent
From $8,235
Compare at $10,654
GIA1.75ct | Cushion | F | VVS2 | Excellent
From $18,738
Compare at $19,050
GIASave 31.5%1.75ct | Cushion | F | VS2 | Excellent
From $9,775
Compare at $14,271
GIASave 24.7%1.75ct | Cushion | I | VS1 | Excellent
From $7,597
Compare at $10,095
HRD1.75ct | Cushion | H | SI1 | Ideal
From $4,350
Compare at $4,585
IGISave 21.9%1.75ct | Cushion | D | VS1 | Very Good
From $668
Compare at $855
GIASave 13.5%1.76ct | Cushion | D | SI1 | Excellent
From $9,847
Compare at $11,386
GIA1.76ct | Cushion | G | VS2 | Excellent
From $14,477
Compare at $14,480
GIASave 53.3%1.76ct | Cushion | I | VVS2 | Ideal
From $6,310
Compare at $13,519
GIASave 29.4%1.76ct | Cushion | FANCY | VVS2 | Good
From $13,408
Compare at $18,992
GIASave 28.9%1.76ct | Cushion | G | SI2 | Excellent
From $5,689
Compare at $8,005
GIASave 14.6%1.76ct | Cushion | G | VVS2 | Excellent
From $7,536
Compare at $8,826
IGISave 76.9%1.76ct | Cushion | F | VVS1 | Very Good
From $807
Compare at $3,490
GIA1.76ct | Cushion | F | VS1 | Very Good
From $16,115
Compare at $16,177
GIA1.76ct | Cushion | H | VS1 | Excellent
From $6,104
Compare at $6,467
GIASave 31.6%1.76ct | Cushion | J | VVS2 | Excellent
From $7,648
Compare at $11,176
IGISave 50%1.76ct | Cushion | FANCY | VVS1 | Very Good
From $1,119
Compare at $2,237
GIASave 40%1.76ct | Cushion | H | VVS2 | Excellent
From $11,214
Compare at $18,703
GIASave 38%1.76ct | Cushion | G | VS1 | Excellent
From $7,106
Compare at $11,458
IGISave 38.3%1.76ct | Cushion | E | VVS1 | Very Good
From $873
Compare at $1,416
GIASave 29.4%1.77ct | Cushion | FANCY | SI1 | Good
From $13,484
Compare at $19,096
GIASave 13.3%1.77ct | Cushion | I | SI1 | Excellent
From $4,265
Compare at $4,921
GIASave 30.9%1.77ct | Cushion | J | VVS2 | Excellent
From $7,004
Compare at $10,130
IGISave 43.8%1.77ct | Cushion | G | VVS2 | Very Good
From $560
Compare at $998
GIASave 21.1%1.77ct | Cushion | F | VS1 | Ideal
From $7,729
Compare at $9,797
IGISave 81.4%1.77ct | Cushion | D | VS1 | Very Good
From $536
Compare at $2,880
IGISave 20.7%1.77ct | Cushion | D | VVS2 | Very Good
From $646
Compare at $814
IGISave 51.3%1.77ct | Cushion | FANCY | VS2 | Very Good
From $998
Compare at $2,050
GIASave 38.7%1.77ct | Cushion | I | VVS1 | Excellent
From $7,239
Compare at $11,806
GIASave 14.2%1.78ct | Cushion | F | VS2 | Excellent
From $10,790
Compare at $12,578
Entry pricing in this category starts around $536.
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 $29,779 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 $9,736 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 252 comparable stones in this segment. Prices start around $536 and go up to $30,315.
Based on the latest market data, the average asking price is about $9,938 with a median around $9,736.
The observed spread is roughly $29,779 across tracked listings, which is about 98.2% 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 $9,736, 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 7 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 $29,779 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.