8 Carat Marquise Natural Diamond Prices Comparison
An 8 carat marquise natural diamond typically costs $127,770 (median of 4 listings at 4 online stores), with most between $85,481 and $226,753. Average prices fell 1.4% over the last month. Updated .
Average $145,833. Listings run from $4,598 to $370,691 in the 8.00–8.99 carat range.
See the live listings8 Carat Marquise Natural Diamond Market Overview
CaratRadar currently tracks 4 verified 8-carat marquise natural diamonds in the 8.00–8.99 carat benchmark range, listed across 4 online retailers. Prices in this segment range from $4,598 to $370,691, with an average asking price of $145,833 and a median of $127,770.
Across this category, asking prices span $366,093 (98.8% from the most expensive to the cheapest listing). The same certified diamond can also be listed at different prices by different retailers, which is why CaratRadar compares stones by certificate number.
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 diamonds tracked in the 8.00–8.99 carat benchmark
Price range: $4,598 to $370,691
Average price: $145,833
Median price: $127,770
Available across 4 retailers
Category price spread: 98.8%
Price Range Overview
As of Oct 23, 2026Real market range for this carat, shape, and diamond type.
4
$4,598
$145,833
$127,770
$370,691
Price History
Price Comparison Matrix
Compare nearby
Prices for the next carat weights, other shapes and the lab grown twin.
Nearby carat weights
Other shapes at 8 carat
Same size, lab grown
Live Listings
See all listingsCompare current retailer offers in the same benchmark range and open any listing for full details.
Save 19.4%IGI | 8.18ct | Marquise | K | SI1 | Excellent
From $86,855
Compare at $107,823
IGI | 8.03ct | Marquise | I | VVS1 | Very Good
From $155,255
Compare at $162,326
Save 22.1%GIA | 8.02ct | Marquise | E | SI1 | Ideal
From $255,535
Compare at $328,148
GIA | 8.01ct | Marquise | G | IF | Excellent
From $320,011
Compare at $325,882
Entry pricing in this benchmark range starts around $4,598.
What to Know When Shopping for 8 Carat Marquise Natural Diamonds
- Always compare identical certified diamonds across retailers, because the same certificate can be listed at different prices by different stores. Across this whole category, asking prices span $366,093 from the cheapest to the most expensive listing.
- 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 $127,770 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.
- Marquise diamonds maximize carat weight face-up and appear larger than their actual weight. Check symmetry carefully.
Frequently Asked Questions
We currently track 4 comparable stones in the 8.00–8.99 carat benchmark range. Prices start around $4,598 and go up to $370,691.
Based on the latest market data, the average asking price is about $145,833 with a median around $127,770.
The observed spread is roughly $366,093 across tracked listings, which is about 98.8% from highest to lowest offer in the 8.00–8.99 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 $145,833. The median price is $127,770, 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. Across this category, asking prices span $366,093 from the cheapest to the most expensive listing, and the same certified diamond can also carry different prices at different 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.
Tools and Guides
Tracking Natural inventory for the 8.00–8.99 carat Marquise diamond benchmark.