0.51ct H SI1 Marquise Natural Diamond
EX • H/SI1 • GIA 6542314932
Certificate GIA 6542314932
Diamond specifications and retailer prices
About this 0.51ct natural marquise diamond
This 0.51ct natural marquise sits in the half to three-quarter carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6542314932. Listed at 16 retailers as of October 28, 2026, with a relatively tight 21% spread, which is unusual at this carat range and suggests competitive pricing across the listings. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.
The 4Cs
Specifications
Caratlytics Score
How it works →16 retailers
Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.
Similar diamonds
- 0.51ct MarquiseH/SI1from £377across 14 retailersAs of November 2, 2026
- 0.51ct MarquiseH/SI1from £393across 14 retailersAs of November 2, 2026
- 0.51ct MarquiseH/SI1from £385across 13 retailersAs of November 2, 2026
- 0.51ct MarquiseH/SI1from £728across 12 retailersAs of November 1, 2026
- 0.51ct MarquiseH/SI1from £340across 10 retailersAs of October 31, 2026
- 0.51ct MarquiseH/SI1from £537across 9 retailersAs of October 31, 2026
- 0.51ct MarquiseH/SI1from £610across 8 retailersAs of October 28, 2026
- 0.51ct MarquiseH/SI1from £429across 8 retailersAs of November 1, 2026