0.9 Carat Radiant Lab Grown Diamond Prices Comparison
As of April 2026, 0.9 carat radiant lab grown diamonds usually range from $166 to $1,833, with an average price of $639.In the last month, prices for these diamonds are down 0.8%.Compare 2,144 verified listings across 7 retailers tracked by CaratRadar.
0.9 Carat Radiant Lab Grown Diamond Market Overview
CaratRadar currently tracks 2,144 verified 0.9-carat radiant lab grown diamonds listed across 7 online retailers. Prices in this segment range from $166 to $1,833, with an average asking price of $639 and a median of $590.
The price spread of $1,667 (90.9% 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.
2,144 diamonds tracked in this segment
Price range: $166 to $1,833
Average price: $639
Median price: $590
Available across 7 retailers
Savings potential: up to 90.9%
Price Range Overview
As of Apr 14, 2026Real market range for this carat, shape, and diamond type.
2,144
$166
$639
$590
$1,833
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 80.9%GCAL | 0.91ct | Radiant | E | SI1 | Excellent
From $311
Compare at $1,630
Save 63.8%IGI | 0.91ct | Radiant | H | VS1 | Very Good
From $630
Compare at $1,740
IGI | 0.91ct | Radiant | I | VS1 | Very Good
From $720
Compare at $764
IGI | 0.91ct | Radiant | J | VS1 | Very Good
From $2,243
Compare at $2,245
Save 78.6%IGI | 0.91ct | Radiant | G | VS1 | Very Good
From $294
Compare at $1,370
Save 67.2%IGI | 0.91ct | Radiant | H | SI1 | Ideal
From $243
Compare at $740
Save 69.6%IGI | 0.91ct | Radiant | G | SI1 | Very Good
From $252
Compare at $830
Save 28.7%IGI | 0.91ct | Radiant | D | VS2 | Ideal
From $630
Compare at $884
Save 78.9%IGI | 0.91ct | Radiant | D | SI1 | Ideal
From $279
Compare at $1,320
Save 66.9%IGI | 0.91ct | Radiant | E | VS2 | Excellent
From $592
Compare at $1,790
Save 25.3%IGI | 0.91ct | Radiant | F | VVS2 | Very Good
From $551
Compare at $738
Save 75.5%IGI | 0.91ct | Radiant | F | VS1 | Ideal
From $395
Compare at $1,610
Save 72.6%IGI | 0.91ct | Radiant | F | VS2 | Ideal
From $520
Compare at $1,900
IGI | 0.91ct | Radiant | I | SI1 | Ideal
From $2,093
Compare at $2,095
Save 75.3%IGI | 0.91ct | Radiant | D | VS1 | Very Good
From $413
Compare at $1,670
IGI | 0.91ct | Radiant | D | VS1 | Ideal
From $915
Compare at $932
Save 75.8%IGI | 0.91ct | Radiant | H | VS2 | Ideal
From $361
Compare at $1,490
Save 75.3%IGI | 0.91ct | Radiant | D | VS2 | Very Good
From $402
Compare at $1,630
Save 57.1%IGI | 0.91ct | Radiant | G | VS2 | Excellent
From $492
Compare at $1,149
Save 74.1%IGI | 0.91ct | Radiant | G | VS1 | Ideal
From $539
Compare at $2,080
Save 57.1%IGI | 0.91ct | Radiant | G | VS2 | Excellent
From $492
Compare at $1,149
Save 51.4%IGI | 0.91ct | Radiant | F | VVS2 | Ideal
From $471
Compare at $970
Save 58.1%IGI | 0.91ct | Radiant | G | VS1 | Excellent
From $310
Compare at $740
Save 74.7%IGI | 0.91ct | Radiant | F | VS1 | Ideal
From $309
Compare at $1,220
Save 80.7%IGI | 0.91ct | Radiant | H | VS1 | Ideal
From $243
Compare at $1,260
Save 80.2%IGI | 0.91ct | Radiant | E | VS2 | Ideal
From $277
Compare at $1,400
Save 56.8%IGI | 0.91ct | Radiant | F | VS2 | Excellent
From $520
Compare at $1,205
Save 67.2%IGI | 0.91ct | Radiant | H | VVS2 | Excellent
From $279
Compare at $850
Save 75.1%IGI | 0.91ct | Radiant | D | VS1 | Ideal
From $384
Compare at $1,540
Save 74.7%IGI | 0.91ct | Radiant | G | VVS2 | Ideal
From $316
Compare at $1,250
Save 52.9%IGI | 0.91ct | Radiant | E | VS1 | Ideal
From $471
Compare at $1,000
Save 35.9%IGI | 0.91ct | Radiant | E | VS1 | Very Good
From $342
Compare at $533
Save 53.1%IGI | 0.91ct | Radiant | G | VS1 | Ideal
From $356
Compare at $760
Save 63.3%IGI | 0.91ct | Radiant | F | VS1 | Good
From $323
Compare at $880
Save 75.5%IGI | 0.91ct | Radiant | F | VS2 | Very Good
From $385
Compare at $1,570
Save 75.3%IGI | 0.91ct | Radiant | D | VS1 | Ideal
From $413
Compare at $1,670
Save 73.4%IGI | 0.91ct | Radiant | F | VS1 | Ideal
From $417
Compare at $1,570
Save 73.4%IGI | 0.91ct | Radiant | F | VS1 | Ideal
From $417
Compare at $1,570
Save 73.9%IGI | 0.91ct | Radiant | G | VS1 | Ideal
From $376
Compare at $1,440
Save 42.3%IGI | 0.91ct | Radiant | D | VS1 | Excellent
From $409
Compare at $708
Save 41.7%IGI | 0.91ct | Radiant | D | VVS2 | Excellent
From $342
Compare at $587
Save 24.1%IGI | 0.91ct | Radiant | E | VS1 | Ideal
From $342
Compare at $451
Save 72.6%IGI | 0.91ct | Radiant | E | VVS2 | Excellent
From $348
Compare at $1,270
Save 79.1%IGI | 0.91ct | Radiant | G | VVS2 | Very Good
From $314
Compare at $1,500
Save 72.6%IGI | 0.91ct | Radiant | D | VS1 | Excellent
From $348
Compare at $1,270
Save 45%IGI | 0.91ct | Radiant | E | VS1 | Ideal
From $345
Compare at $627
Save 74.2%IGI | 0.91ct | Radiant | F | VVS1 | Ideal
From $346
Compare at $1,340
Save 74.5%IGI | 0.91ct | Radiant | E | VVS2 | Very Good
From $331
Compare at $1,300
Save 74.5%IGI | 0.91ct | Radiant | E | VVS2 | Very Good
From $331
Compare at $1,300
Save 72.6%IGI | 0.91ct | Radiant | E | VS1 | Excellent
From $345
Compare at $1,260
Entry pricing in this category starts around $166.
What to Know When Shopping for 0.9 Carat Radiant Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $1,667 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 $590 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.
- Radiant cuts combine the elegance of emerald shapes with the brilliance of round cuts, offering good value per carat.
Frequently Asked Questions
We currently track 2,144 comparable stones in this segment. Prices start around $166 and go up to $1,833.
Based on the latest market data, the average asking price is about $639 with a median around $590.
The observed spread is roughly $1,667 across tracked listings, which is about 90.9% 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 $590, 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 $1,667 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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