0.3 Carat Cushion Natural Diamond Prices Comparison
As of May 2026, 0.3 carat cushion natural diamonds usually range from $266 to $14,711, with an average price of $1,028.In the last month, prices for these diamonds are down 6.9%.Compare 274 verified listings across 6 retailers tracked by CaratRadar.
0.3 Carat Cushion Natural Diamond Market Overview
CaratRadar currently tracks 274 verified 0.3-carat cushion natural diamonds listed across 6 online retailers. Prices in this segment range from $266 to $14,711, with an average asking price of $1,028 and a median of $515.
The price spread of $14,445 (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.
274 diamonds tracked in this segment
Price range: $266 to $14,711
Average price: $1,028
Median price: $515
Available across 6 retailers
Savings potential: up to 98.2%
Price Range Overview
As of May 30, 2026Real market range for this carat, shape, and diamond type.
274
$266
$1,028
$515
$14,711
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 21.6%GIA | 0.3ct | Cushion | K | VS2 | Excellent
From $273
Compare at $348
Save 23%GIA | 0.31ct | Cushion | K | VS2 | Excellent
From $280
Compare at $364
GIA | 0.3ct | Cushion | J | VS2 | Excellent
From $319
Compare at $351
GIA | 0.4ct | Cushion | K | VS1 | Excellent
From $328
Compare at $355
Save 15.2%GIA | 0.33ct | Cushion | H | SI1 | Excellent
From $365
Compare at $431
Save 18.2%GIA | 0.32ct | Cushion | I | VS2 | Excellent
From $366
Compare at $448
Save 12.5%GIA | 0.3ct | Cushion | J | VS1 | Excellent
From $368
Compare at $421
Save 28.2%GIA | 0.33ct | Cushion | H | VS2 | Ideal
From $370
Compare at $515
Save 17%GIA | 0.32ct | Cushion | J | VS1 | Excellent
From $372
Compare at $448
Save 17%GIA | 0.31ct | Cushion | I | VS2 | Excellent
From $372
Compare at $448
Save 17.4%GIA | 0.3ct | Cushion | I | VS1 | Excellent
From $378
Compare at $458
Save 17.7%GIA | 0.4ct | Cushion | K | VVS1 | Excellent
From $378
Compare at $459
Save 27.9%GIA | 0.32ct | Cushion | H | VS2 | Ideal
From $380
Compare at $527
Save 25.9%GIA | 0.31ct | Cushion | H | VS1 | Very Good
From $380
Compare at $513
Save 16.2%GIA | 0.33ct | Cushion | J | VS1 | Excellent
From $387
Compare at $462
Save 17.7%GIA | 0.3ct | Cushion | J | VVS1 | Excellent
From $389
Compare at $473
Save 17%GIA | 0.36ct | Cushion | J | VS1 | Excellent
From $399
Compare at $481
Save 26.5%GIA | 0.3ct | Cushion | E | VVS1 | Ideal
From $400
Compare at $544
Save 23.2%GIA | 0.4ct | Cushion | F | SI1 | Ideal
From $407
Compare at $530
Save 28.1%GIA | 0.3ct | Cushion | E | VS1 | Ideal
From $410
Compare at $571
Save 18.9%GIA | 0.35ct | Cushion | J | VVS2 | Excellent
From $410
Compare at $505
Save 17.6%GIA | 0.35ct | Cushion | J | VS1 | Excellent
From $417
Compare at $506
Save 27.5%GIA | 0.4ct | Cushion | G | VS2 | Ideal
From $420
Compare at $579
Save 26.5%GIA | 0.3ct | Cushion | E | VVS2 | Ideal
From $420
Compare at $571
Save 19.2%GIA | 0.36ct | Cushion | J | VVS2 | Excellent
From $420
Compare at $519
Save 17.8%GIA | 0.3ct | Cushion | G | SI1 | Excellent
From $420
Compare at $511
GIA | 0.38ct | Cushion | E | SI2 | Excellent
From $423
Compare at $452
Save 12.8%GIA | 0.3ct | Cushion | G | SI2 | Ideal
From $427
Compare at $490
Save 28.4%GIA | 0.4ct | Cushion | G | VS1 | Ideal
From $430
Compare at $601
Save 19.9%GIA | 0.4ct | Cushion | K | IF | Excellent
From $430
Compare at $537
Save 18.6%GIA | 0.4ct | Cushion | J | VVS2 | Excellent
From $437
Compare at $537
Save 20.8%GIA | 0.4ct | Cushion | J | VS1 | Excellent
From $437
Compare at $552
Save 27.5%GIA | 0.31ct | Cushion | E | VS1 | Ideal
From $440
Compare at $607
Save 14.2%GIA | 0.4ct | Cushion | H | SI1 | Excellent
From $445
Compare at $519
Save 15.7%GIA | 0.31ct | Cushion | H | VVS2 | Excellent
From $447
Compare at $530
Save 14.5%GIA | 0.32ct | Cushion | H | VS2 | Excellent
From $448
Compare at $524
Save 14.3%GIA | 0.31ct | Cushion | H | VS2 | Excellent
From $448
Compare at $522
Save 23.3%GIA | 0.4ct | Cushion | H | VS1 | Good
From $449
Compare at $585
Save 14.5%GIA | 0.35ct | Cushion | I | VS2 | Excellent
From $449
Compare at $525
Save 14.3%GIA | 0.33ct | Cushion | J | VVS1 | Excellent
From $449
Compare at $524
GIA | 0.4ct | Cushion | F | SI2 | Excellent
From $450
Compare at $478
Save 26.9%GIA | 0.3ct | Cushion | D | VS2 | Very Good
From $450
Compare at $616
Save 14.5%GIA | 0.33ct | Cushion | I | VVS1 | Excellent
From $450
Compare at $527
Save 19.5%GIA | 0.4ct | Cushion | J | VS1 | Excellent
From $451
Compare at $561
Save 14.5%GIA | 0.3ct | Cushion | E | VS1 | Excellent
From $451
Compare at $528
Save 14.3%GIA | 0.31ct | Cushion | F | VS2 | Excellent
From $454
Compare at $530
Save 15.8%GIA | 0.32ct | Cushion | H | VS2 | Excellent
From $454
Compare at $539
Save 33.1%GIA | 0.4ct | Cushion | F | VS2 | Very Good
From $458
Compare at $685
Save 37.6%GIA | 0.4ct | Cushion | F | VS2 | Excellent
From $459
Compare at $735
Save 16.1%GIA | 0.31ct | Cushion | I | VVS1 | Excellent
From $459
Compare at $547
Entry pricing in this category starts around $266.
What to Know When Shopping for 0.3 Carat Cushion Natural Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $14,445 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 $515 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 274 comparable stones in this segment. Prices start around $266 and go up to $14,711.
Based on the latest market data, the average asking price is about $1,028 with a median around $515.
The observed spread is roughly $14,445 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 completed market data, the fair market benchmark is $1,028. The median price is $515, 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 6 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 $14,445 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 0.3 carat Cushion diamonds.