4 Carat Cushion Lab Grown Diamond Prices Comparison
As of October 2026, 4 carat cushion lab grown diamonds in the 4.00–4.49 carat benchmark range usually range from $144 to $39,636, with an average price of $3,314.In the last month, prices for these diamonds are up 0.7%.Compare 4,941 verified listings across 19 retailers tracked by CaratRadar.
4 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 4,941 verified 4-carat cushion lab grown diamonds in the 4.00–4.49 carat benchmark range, listed across 19 online retailers. Prices in this segment range from $144 to $39,636, with an average asking price of $3,314 and a median of $2,254.
The price spread of $39,492 (99.6% 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.
4,941 diamonds tracked in the 4.00–4.49 carat benchmark
Price range: $144 to $39,636
Average price: $3,314
Median price: $2,254
Available across 19 retailers
Savings potential: up to 99.6%
Price Range Overview
As of Oct 15, 2026Real market range for this carat, shape, and diamond type.
4,941
$144
$3,314
$2,254
$39,636
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.
Save 78.9%IGI | 4.02ct | Cushion | H | VVS2 | Ideal
From $641
Compare at $3,040
Save 79.6%IGI | 4.02ct | Cushion | E | SI1 | Ideal
From $650
Compare at $3,180
Save 80%IGI | 4.02ct | Cushion | G | VS1 | Excellent
From $666
Compare at $3,330
Save 70.8%IGI | 4.01ct | Cushion | F | VVS2 | Ideal
From $684
Compare at $2,345
Save 78.8%IGI | 4.01ct | Cushion | H | VVS2 | Ideal
From $684
Compare at $3,230
Save 52.9%IGI | 4.01ct | Cushion | G | VVS2 | Very Good
From $688
Compare at $1,462
Save 65.8%IGI | 4.01ct | Cushion | G | VS1 | Very Good
From $690
Compare at $2,020
Save 70.1%IGI | 4.01ct | Cushion | F | VVS2 | Very Good
From $692
Compare at $2,311
Save 25.5%IGI | 4ct | Cushion | E | SI1 | Very Good
From $694
Compare at $931
Save 58.9%IGI | 4.03ct | Cushion | F | VVS2 | Ideal
From $695
Compare at $1,693
Save 79.6%IGI | 4.09ct | Cushion | H | VVS2 | Ideal
From $695
Compare at $3,400
Save 66.7%IGI | 4.05ct | Cushion | F | SI1 | Excellent
From $695
Compare at $2,088
Save 70.1%IGI | 4.09ct | Cushion | G | VS1 | Very Good
From $696
Compare at $2,325
Save 55.4%IGI | 4.01ct | Cushion | F | VS1 | Ideal
From $700
Compare at $1,571
Save 78.8%IGI | 4.01ct | Cushion | G | VS1 | Very Good
From $704
Compare at $3,320
Save 79.7%IGI | 4.01ct | Cushion | G | VS1 | Ideal
From $705
Compare at $3,470
Save 49.7%IGI | 4.07ct | Cushion | G | VS1 | Very Good
From $706
Compare at $1,403
Save 68.1%IGI | 4.07ct | Cushion | G | VS1 | Very Good
From $706
Compare at $2,211
Save 58.4%IGI | 4.06ct | Cushion | F | VVS2 | Excellent
From $706
Compare at $1,699
Save 78.1%IGI | 4.4ct | Cushion | F | VVS2 | Very Good
From $709
Compare at $3,240
Save 78.9%IGI | 4.07ct | Cushion | G | VS1 | Very Good
From $710
Compare at $3,370
Save 68.9%IGI | 4.01ct | Cushion | E | VS2 | Excellent
From $711
Compare at $2,286
Save 69.8%IGI | 4.01ct | Cushion | F | VS1 | Very Good
From $714
Compare at $2,362
Save 71.2%IGI | 4.29ct | Cushion | E | VS1 | Ideal
From $714
Compare at $2,481
Save 79.2%IGI | 4ct | Cushion | G | VS2 | Ideal
From $715
Compare at $3,440
Save 78.1%IGI | 4.02ct | Cushion | F | VVS2 | Very Good
From $716
Compare at $3,274
Save 48.7%IGI | 4.03ct | Cushion | G | VS1 | Ideal
From $718
Compare at $1,400
Save 69.8%IGI | 4.08ct | Cushion | D | VS2 | Ideal
From $719
Compare at $2,377
Save 69.8%IGI | 4.04ct | Cushion | F | VS1 | Very Good
From $719
Compare at $2,379
Save 69.8%IGI | 4.32ct | Cushion | G | SI1 | Ideal
From $720
Compare at $2,382
Save 76.7%IGI | 4.02ct | Cushion | G | VS2 | Ideal
From $720
Compare at $3,090
Save 68.2%IGI | 4ct | Cushion | F | VVS2 | Ideal
From $720
Compare at $2,264
Save 79.8%IGI | 4.02ct | Cushion | G | VVS2 | Very Good
From $720
Compare at $3,570
Save 72.6%IGI | 4.04ct | Cushion | G | VVS2 | Excellent
From $720
Compare at $2,625
Save 72.6%IGI | 4.04ct | Cushion | G | VVS2 | Very Good
From $720
Compare at $2,625
Save 40.6%IGI | 4.32ct | Cushion | F | VVS2 | Very Good
From $720
Compare at $1,213
Save 69.7%IGI | 4.09ct | Cushion | D | VS2 | Very Good
From $721
Compare at $2,383
Save 72%IGI | 4.03ct | Cushion | F | VS1 | Very Good
From $722
Compare at $2,575
Save 78.2%IGI | 4ct | Cushion | G | VS1 | Very Good
From $722
Compare at $3,310
Save 53.7%IGI | 4.01ct | Cushion | E | VS2 | Very Good
From $724
Compare at $1,565
Save 79.4%IGI | 4.09ct | Cushion | G | VS2 | Ideal
From $725
Compare at $3,520
Save 70.9%IGI | 4.03ct | Cushion | F | VS1 | Excellent
From $725
Compare at $2,488
Save 76.8%IGI | 4.01ct | Cushion | F | SI1 | Ideal
From $726
Compare at $3,130
Save 79.5%IGI | 4.08ct | Cushion | G | VS1 | Ideal
From $726
Compare at $3,550
Save 57.8%IGI | 4ct | Cushion | E | VS1 | Very Good
From $728
Compare at $1,725
Save 75.5%IGI | 4.04ct | Cushion | G | VS1 | Very Good
From $729
Compare at $2,975
Save 46.9%IGI | 4ct | Cushion | G | VS1 | Very Good
From $729
Compare at $1,372
Save 78.1%IGI | 4.01ct | Cushion | E | VS1 | Very Good
From $729
Compare at $3,335
Save 57.9%IGI | 4.01ct | Cushion | E | VS1 | Very Good
From $729
Compare at $1,733
Save 60.1%IGI | 4.01ct | Cushion | E | VVS2 | Very Good
From $729
Compare at $1,828
Entry pricing in this benchmark range starts around $144.
What to Know When Shopping for 4 Carat Cushion Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $39,492 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 $2,254 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 4,941 comparable stones in the 4.00–4.49 carat benchmark range. Prices start around $144 and go up to $39,636.
Based on the latest market data, the average asking price is about $3,314 with a median around $2,254.
The observed spread is roughly $39,492 across tracked listings, which is about 99.6% from highest to lowest offer in the 4.00–4.49 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 $3,314. The median price is $2,254, 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 19 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 $39,492 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
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Tracking Lab Grown inventory for the 4.00–4.49 carat Cushion diamond benchmark.