0.3 Carat Cushion Lab Grown Diamond Prices Comparison
As of May 2026, 0.3 carat cushion lab grown diamonds usually range from $100 to $767, with an average price of $268.In the last month, prices for these diamonds are down 4%.Compare 148 verified listings across 4 retailers tracked by CaratRadar.
0.3 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 148 verified 0.3-carat cushion lab grown diamonds listed across 4 online retailers. Prices in this segment range from $100 to $767, with an average asking price of $268 and a median of $197.
The price spread of $667 (87.0% 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.
148 diamonds tracked in this segment
Price range: $100 to $767
Average price: $268
Median price: $197
Available across 4 retailers
Savings potential: up to 87.0%
Price Range Overview
As of May 29, 2026Real market range for this carat, shape, and diamond type.
148
$100
$268
$197
$767
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 40.1%IGI | 0.33ct | Cushion | D | VS2 | Very Good
From $106
Compare at $177
Save 58.6%IGI | 0.4ct | Cushion | D | VVS2 | Very Good
From $111
Compare at $268
Save 58.6%IGI | 0.4ct | Cushion | D | VVS2 | Very Good
From $112
Compare at $271
Save 55.2%IGI | 0.3ct | Cushion | E | VS1 | Very Good
From $124
Compare at $277
Save 39%IGI | 0.31ct | Cushion | D | VS2 | Very Good
From $132
Compare at $216
Save 58.4%IGI | 0.36ct | Cushion | E | VS1 | Very Good
From $133
Compare at $320
Save 39.5%IGI | 0.32ct | Cushion | E | VVS2 | Very Good
From $133
Compare at $220
Save 54.5%IGI | 0.4ct | Cushion | D | VVS2 | Ideal
From $134
Compare at $294
Save 53.4%IGI | 0.3ct | Cushion | E | VVS1 | Very Good
From $135
Compare at $290
Save 53.1%IGI | 0.32ct | Cushion | D | VS2 | Very Good
From $136
Compare at $290
Save 53.1%IGI | 0.3ct | Cushion | D | VVS2 | Very Good
From $136
Compare at $290
Save 54.3%IGI | 0.4ct | Cushion | D | VS1 | Ideal
From $139
Compare at $304
Save 56.3%IGI | 0.33ct | Cushion | E | VVS2 | Very Good
From $140
Compare at $320
Save 56.3%IGI | 0.33ct | Cushion | D | VS1 | Very Good
From $142
Compare at $325
Save 52.3%IGI | 0.31ct | Cushion | E | VVS2 | Ideal
From $143
Compare at $300
Save 39.2%IGI | 0.37ct | Cushion | E | VS1 | Ideal
From $143
Compare at $235
Save 49.1%IGI | 0.32ct | Cushion | D | VS1 | Ideal
From $144
Compare at $283
Save 49.1%IGI | 0.33ct | Cushion | E | VVS2 | Ideal
From $144
Compare at $283
Save 53.5%IGI | 0.34ct | Cushion | D | VS2 | Ideal
From $144
Compare at $310
Save 39%IGI | 0.32ct | Cushion | D | VS1 | Ideal
From $144
Compare at $236
Save 49%IGI | 0.32ct | Cushion | D | VVS2 | Excellent
From $145
Compare at $284
Save 55.8%IGI | 0.37ct | Cushion | E | VS1 | Ideal
From $146
Compare at $330
Save 44.2%IGI | 0.4ct | Cushion | D | VVS2 | Excellent
From $148
Compare at $265
Save 44.2%IGI | 0.4ct | Cushion | D | VVS2 | Ideal
From $148
Compare at $265
Save 49.2%IGI | 0.33ct | Cushion | D | VVS2 | Ideal
From $149
Compare at $293
Save 49.2%IGI | 0.33ct | Cushion | D | VVS2 | Very Good
From $149
Compare at $293
Save 48.9%IGI | 0.34ct | Cushion | E | VVS2 | Excellent
From $149
Compare at $292
Save 39.3%IGI | 0.36ct | Cushion | D | VS1 | Very Good
From $150
Compare at $247
Save 45.7%IGI | 0.4ct | Cushion | D | VVS2 | Very Good
From $151
Compare at $278
Save 49.1%IGI | 0.32ct | Cushion | D | VVS2 | Very Good
From $152
Compare at $299
Save 49.1%IGI | 0.32ct | Cushion | D | VVS1 | Very Good
From $152
Compare at $299
Save 49.1%IGI | 0.32ct | Cushion | D | VVS1 | Very Good
From $152
Compare at $299
Save 51%IGI | 0.32ct | Cushion | D | VVS1 | Very Good
From $152
Compare at $310
Save 39%IGI | 0.38ct | Cushion | F | VVS2 | Very Good
From $152
Compare at $249
Save 56.3%IGI | 0.4ct | Cushion | D | VS2 | Ideal
From $153
Compare at $350
Save 49%IGI | 0.34ct | Cushion | D | VVS2 | Excellent
From $154
Compare at $302
Save 49%IGI | 0.37ct | Cushion | D | VS2 | Ideal
From $157
Compare at $308
Save 49%IGI | 0.37ct | Cushion | D | VS2 | Ideal
From $157
Compare at $308
Save 56.3%IGI | 0.37ct | Cushion | E | VS1 | Very Good
From $157
Compare at $359
Save 48.9%IGI | 0.35ct | Cushion | D | VS1 | Ideal
From $158
Compare at $309
Save 48.9%IGI | 0.35ct | Cushion | D | VS1 | Ideal
From $158
Compare at $309
Save 49.1%IGI | 0.35ct | Cushion | D | VVS2 | Excellent
From $158
Compare at $311
Save 39.1%IGI | 0.35ct | Cushion | D | VVS2 | Very Good
From $158
Compare at $260
Save 48.9%IGI | 0.37ct | Cushion | E | VVS2 | Ideal
From $162
Compare at $317
Save 50.9%IGI | 0.36ct | Cushion | D | VS1 | Ideal
From $162
Compare at $330
Save 49%IGI | 0.36ct | Cushion | D | VVS2 | Ideal
From $163
Compare at $319
Save 38.8%IGI | 0.4ct | Cushion | F | VVS1 | Very Good
From $163
Compare at $266
Save 38.9%IGI | 0.36ct | Cushion | D | VVS2 | Very Good
From $163
Compare at $267
Save 56.2%IGI | 0.36ct | Cushion | E | VVS2 | Ideal
From $165
Compare at $377
Save 53.9%IGI | 0.4ct | Cushion | D | VVS2 | Excellent
From $166
Compare at $360
Entry pricing in this category starts around $100.
What to Know When Shopping for 0.3 Carat Cushion Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $667 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 $197 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 148 comparable stones in this segment. Prices start around $100 and go up to $767.
Based on the latest market data, the average asking price is about $268 with a median around $197.
The observed spread is roughly $667 across tracked listings, which is about 87.0% 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 $268. The median price is $197, 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 4 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 $667 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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