1.8 Carat Cushion Lab Grown Diamond Prices Comparison
As of April 2026, 1.8 carat cushion lab grown diamonds usually range from $361 to $7,763, with an average price of $1,456.In the last month, prices for these diamonds are down 1.3%.Compare 1,216 verified listings across 10 retailers tracked by CaratRadar.
1.8 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 1,216 verified 1.8-carat cushion lab grown diamonds listed across 10 online retailers. Prices in this segment range from $361 to $7,763, with an average asking price of $1,456 and a median of $1,137.
The price spread of $7,402 (95.3% 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.
1,216 diamonds tracked in this segment
Price range: $361 to $7,763
Average price: $1,456
Median price: $1,137
Available across 10 retailers
Savings potential: up to 95.3%
Price Range Overview
As of Apr 14, 2026Real market range for this carat, shape, and diamond type.
1,216
$361
$1,456
$1,137
$7,763
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 74.5%GCAL | 1.81ct | Cushion | D | VS1 | Excellent
From $953
Compare at $3,740
Save 74.6%GCAL | 1.81ct | Cushion | D | VS2 | Excellent
From $914
Compare at $3,600
Save 74.6%GCAL | 1.81ct | Cushion | D | VS2 | Excellent
From $914
Compare at $3,600
Save 76.1%GCAL | 1.81ct | Cushion | D | VVS1 | Excellent
From $1,283
Compare at $5,360
Save 73.9%GIA | 1.81ct | Cushion | D | VVS2 | Good
From $1,213
Compare at $4,640
Save 76.3%GIA | 1.81ct | Cushion | E | VVS1 | Excellent
From $1,852
Compare at $7,820
Save 59.1%GIA | 1.81ct | Cushion | H | VVS2 | Ideal
From $1,415
Compare at $3,460
Save 73.9%GIA | 1.81ct | Cushion | D | VVS2 | Good
From $1,213
Compare at $4,640
Save 72.2%GIA | 1.81ct | Cushion | D | VS1 | Excellent
From $1,006
Compare at $3,620
Save 76.8%GIA | 1.81ct | Cushion | D | VS1 | Excellent
From $1,247
Compare at $5,380
Save 57.8%GIA | 1.81ct | Cushion | F | VVS2 | Excellent
From $1,185
Compare at $2,810
Save 77.9%GIA | 1.81ct | Cushion | D | VVS1 | Excellent
From $1,205
Compare at $5,440
Save 76.8%GIA | 1.81ct | Cushion | D | VVS2 | Excellent
From $1,037
Compare at $4,470
Save 73.5%GIA | 1.81ct | Cushion | D | SI1 | Excellent
From $1,228
Compare at $4,640
Save 78.2%GIA | 1.81ct | Cushion | E | VVS2 | Excellent
From $1,174
Compare at $5,380
Save 65.5%GIA | 1.81ct | Cushion | H | VS1 | Ideal
From $1,444
Compare at $4,180
Save 62.1%GIA | 1.81ct | Cushion | E | VS2 | Excellent
From $1,024
Compare at $2,700
GIA | 1.81ct | Cushion | G | VS1 | Excellent
From $1,705
Save 54.1%GIA | 1.81ct | Cushion | E | VS2 | Excellent
From $1,271
Compare at $2,770
Save 65.6%GIA | 1.81ct | Cushion | F | VVS1 | Excellent
From $1,153
Compare at $3,350
Save 51.8%GIA | 1.81ct | Cushion | D | VS2 | Excellent
From $2,303
Compare at $4,780
Save 64.8%GIA | 1.81ct | Cushion | F | IF | Ideal
From $3,130
Compare at $8,900
Save 62.3%GIA | 1.81ct | Cushion | E | IF | Excellent
From $3,957
Compare at $10,490
Save 62.7%GIA | 1.81ct | Cushion | F | VVS1 | Excellent
From $1,250
Compare at $3,350
Save 63.3%GIA | 1.81ct | Cushion | D | VS1 | Excellent
From $1,042
Compare at $2,835
Save 76.8%GIA | 1.81ct | Cushion | D | VVS2 | Excellent
From $1,037
Compare at $4,470
Save 42.1%IGI | 1.81ct | Cushion | I | VS1 | Ideal
From $1,655
Compare at $2,860
Save 27.9%IGI | 1.81ct | Cushion | I | SI1 | Ideal
From $1,305
Compare at $1,810
Save 94.8%IGI | 1.81ct | Cushion | D | SI1 | Excellent
From $759
Compare at $14,661
Save 71.8%IGI | 1.81ct | Cushion | E | VS1 | Very Good
From $645
Compare at $2,290
Save 72.6%IGI | 1.81ct | Cushion | F | SI1 | Very Good
From $624
Compare at $2,280
Save 95.7%IGI | 1.81ct | Cushion | H | VVS2 | Excellent
From $655
Compare at $15,204
Save 18.8%IGI | 1.81ct | Cushion | H | VS2 | Very Good
From $1,450
Compare at $1,786
Save 81.7%IGI | 1.81ct | Cushion | G | VS1 | Ideal
From $565
Compare at $3,090
Save 95.4%IGI | 1.81ct | Cushion | H | VS1 | Ideal
From $655
Compare at $14,299
Save 72.4%IGI | 1.81ct | Cushion | E | SI1 | Ideal
From $522
Compare at $1,890
Save 70.8%IGI | 1.81ct | Cushion | F | VS1 | Ideal
From $867
Compare at $2,970
Save 71.4%IGI | 1.81ct | Cushion | F | VS2 | Ideal
From $674
Compare at $2,360
Save 71%IGI | 1.81ct | Cushion | E | VS1 | Very Good
From $832
Compare at $2,870
IGI | 1.81ct | Cushion | G | VVS2 | Ideal
From $695
Compare at $728
Save 67.9%IGI | 1.81ct | Cushion | F | VVS2 | Ideal
From $709
Compare at $2,210
Save 75.6%IGI | 1.81ct | Cushion | E | VS1 | Ideal
From $709
Compare at $2,900
Save 71.4%IGI | 1.81ct | Cushion | F | VS1 | Ideal
From $681
Compare at $2,380
Save 71.3%IGI | 1.81ct | Cushion | F | VVS2 | Ideal
From $709
Compare at $2,470
Save 72.5%IGI | 1.81ct | Cushion | G | VS2 | Very Good
From $537
Compare at $1,950
Save 70.8%IGI | 1.81ct | Cushion | E | VS1 | Ideal
From $837
Compare at $2,870
Save 72.1%IGI | 1.81ct | Cushion | G | VS1 | Very Good
From $586
Compare at $2,100
Save 72.4%IGI | 1.81ct | Cushion | G | VS1 | Very Good
From $552
Compare at $2,000
Save 73.3%IGI | 1.81ct | Cushion | F | VVS2 | Ideal
From $729
Compare at $2,730
Save 72%IGI | 1.81ct | Cushion | F | VS2 | Very Good
From $593
Compare at $2,120
Entry pricing in this category starts around $361.
What to Know When Shopping for 1.8 Carat Cushion Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $7,402 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 $1,137 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.
- Lab-grown diamonds offer excellent value. Ensure the stone comes with a GIA or IGI certificate confirming it is laboratory-grown.
- 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 1,216 comparable stones in this segment. Prices start around $361 and go up to $7,763.
Based on the latest market data, the average asking price is about $1,456 with a median around $1,137.
The observed spread is roughly $7,402 across tracked listings, which is about 95.3% 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 $1,137, 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 10 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 $7,402 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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