1.5 Carat Round Natural Diamond Prices Comparison
As of October 2026, 1.5 carat round natural diamonds in the 1.50–1.74 carat benchmark range usually range from $505 to $30,931, with an average price of $8,541.In the last month, prices for these diamonds are down 1.4%.Compare 14,922 verified listings across 14 retailers tracked by CaratRadar.
1.5 Carat Round Natural Diamond Market Overview
CaratRadar currently tracks 14,922 verified 1.5-carat round natural diamonds in the 1.50–1.74 carat benchmark range, listed across 14 online retailers. Prices in this segment range from $505 to $30,931, with an average asking price of $8,541 and a median of $7,815.
The price spread of $30,426 (98.4% 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.
14,922 diamonds tracked in the 1.50–1.74 carat benchmark
Price range: $505 to $30,931
Average price: $8,541
Median price: $7,815
Available across 14 retailers
Savings potential: up to 98.4%
Price Range Overview
As of Oct 14, 2026Real market range for this carat, shape, and diamond type.
14,922
$505
$8,541
$7,815
$30,931
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.
IGI | 1.51ct | Round | G | I1 | Excellent
From $980
Compare at $1,057
Save 17%IGI | 1.55ct | Round | M | SI2 | Ideal
From $1,004
Compare at $1,209
Save 15.3%IGI | 1.52ct | Round | M | SI2 | Excellent
From $1,005
Compare at $1,187
Save 15.3%IGI | 1.53ct | Round | M | SI2 | Ideal
From $1,011
Compare at $1,194
Save 17%IGI | 1.57ct | Round | M | SI2 | Very Good
From $1,017
Compare at $1,225
Save 15.3%IGI | 1.54ct | Round | M | SI2 | Ideal
From $1,018
Compare at $1,202
Save 15.3%IGI | 1.54ct | Round | M | SI2 | Excellent
From $1,018
Compare at $1,202
Save 17%IGI | 1.5ct | Round | L | SI2 | Excellent
From $1,038
Compare at $1,250
Save 17%IGI | 1.61ct | Round | M | SI2 | Excellent
From $1,042
Compare at $1,255
Save 17%IGI | 1.51ct | Round | L | SI2 | Excellent
From $1,044
Compare at $1,258
Save 17%IGI | 1.51ct | Round | L | SI2 | Excellent
From $1,044
Compare at $1,258
Save 17%IGI | 1.62ct | Round | M | SI2 | Excellent
From $1,048
Compare at $1,262
Save 16.9%IGI | 1.52ct | Round | L | SI2 | Very Good
From $1,052
Compare at $1,266
Save 16.9%IGI | 1.52ct | Round | L | SI2 | Excellent
From $1,052
Compare at $1,266
Save 17%IGI | 1.63ct | Round | M | SI2 | Ideal
From $1,054
Compare at $1,270
Save 16.9%IGI | 1.66ct | Round | M | SI2 | Excellent
From $1,074
Compare at $1,293
IGI | 1.5ct | Round | L | SI2 | Excellent
From $1,075
Compare at $1,130
Save 16.9%IGI | 1.56ct | Round | L | SI2 | Excellent
From $1,079
Compare at $1,299
Save 17%IGI | 1.57ct | Round | L | SI2 | Ideal
From $1,085
Compare at $1,307
Save 17%IGI | 1.57ct | Round | L | SI2 | Excellent
From $1,085
Compare at $1,307
Save 17%IGI | 1.58ct | Round | L | SI2 | Excellent
From $1,091
Compare at $1,315
Save 17%IGI | 1.7ct | Round | M | SI2 | Excellent
From $1,098
Compare at $1,323
Save 17%IGI | 1.7ct | Round | M | SI2 | Excellent
From $1,098
Compare at $1,323
Save 17%IGI | 1.61ct | Round | M | SI2 | Excellent
From $1,109
Compare at $1,336
Save 17%IGI | 1.63ct | Round | L | SI2 | Excellent
From $1,125
Compare at $1,355
Save 17%IGI | 1.69ct | Round | L | SI2 | Excellent
From $1,166
Compare at $1,404
Save 17%IGI | 1.5ct | Round | L | SI2 | Ideal
From $1,172
Compare at $1,412
Save 17%IGI | 1.7ct | Round | L | SI2 | Excellent
From $1,172
Compare at $1,412
IGI | 1.51ct | Round | L | I1 | Excellent
From $1,173
Compare at $1,261
Save 16.9%IGI | 1.71ct | Round | L | SI2 | Excellent
From $1,180
Compare at $1,420
Save 16.9%IGI | 1.72ct | Round | L | SI2 | Excellent
From $1,186
Compare at $1,428
Save 17%IGI | 1.62ct | Round | L | SI2 | Excellent
From $1,191
Compare at $1,435
Save 11%IGI | 1.5ct | Round | L | I1 | Ideal
From $1,203
Compare at $1,352
Save 17%IGI | 1.6ct | Round | M | SI1 | Excellent
From $1,209
Compare at $1,457
Save 32.8%IGI | 1.65ct | Round | L | SI2 | Very Good
From $1,221
Compare at $1,817
Save 19.6%IGI | 1.54ct | Round | K | SI2 | Excellent
From $1,235
Compare at $1,537
IGI | 1.51ct | Round | L | SI2 | Ideal
From $1,257
Compare at $1,278
Save 19.7%IGI | 1.51ct | Round | L | SI1 | Excellent
From $1,283
Compare at $1,598
Save 19.7%IGI | 1.5ct | Round | M | SI1 | Excellent
From $1,288
Compare at $1,603
Save 19.7%IGI | 1.57ct | Round | L | SI1 | Excellent
From $1,333
Compare at $1,660
IGI | 1.7ct | Round | L | SI2 | Ideal
From $1,338
Compare at $1,389
Save 19.7%IGI | 1.53ct | Round | L | SI2 | Ideal
From $1,355
Compare at $1,688
Save 19.7%IGI | 1.6ct | Round | L | SI1 | Excellent
From $1,358
Compare at $1,691
Save 21.1%IGI | 1.62ct | Round | L | SI2 | Ideal
From $1,409
Compare at $1,785
Save 19.7%IGI | 1.5ct | Round | L | SI1 | Excellent
From $1,414
Compare at $1,760
Save 19.7%IGI | 1.61ct | Round | L | SI2 | Ideal
From $1,424
Compare at $1,774
Save 19.7%IGI | 1.52ct | Round | L | SI1 | Excellent
From $1,432
Compare at $1,783
Save 19.7%IGI | 1.52ct | Round | L | SI1 | Excellent
From $1,432
Compare at $1,783
Save 19.7%IGI | 1.52ct | Round | L | SI1 | Excellent
From $1,432
Compare at $1,783
Save 19.7%IGI | 1.71ct | Round | L | SI2 | Excellent
From $1,438
Compare at $1,790
Entry pricing in this benchmark range starts around $505.
What to Know When Shopping for 1.5 Carat Round Natural Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $30,426 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 $7,815 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.
- Round brilliants command a premium due to higher rough waste during cutting. If budget matters, consider oval or cushion shapes for similar visual size.
Frequently Asked Questions
We currently track 14,922 comparable stones in the 1.50–1.74 carat benchmark range. Prices start around $505 and go up to $30,931.
Based on the latest market data, the average asking price is about $8,541 with a median around $7,815.
The observed spread is roughly $30,426 across tracked listings, which is about 98.4% from highest to lowest offer in the 1.50–1.74 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 $8,541. The median price is $7,815, 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 14 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 $30,426 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
Explore adjacent carat ranges and shapes to compare market shifts.
1.25 Carat Round Natural Diamond Prices
1 Carat Round Natural Diamond Prices
1.75 Carat Round Natural Diamond Prices
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1.5 Carat Cushion Natural Diamond Prices
1.5 Carat Emerald Natural Diamond Prices
1.5 Carat Pear Natural Diamond Prices
1.5 Carat Heart Natural Diamond Prices
1.5 Carat Princess Natural Diamond Prices
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Tracking Natural inventory for the 1.50–1.74 carat Round diamond benchmark.