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Marquise|Natural|GIA

0.51ct H I1 Marquise Natural Diamond

H/I1 • GIA 6237886517

Certificate GIA 6237886517

Diamond specifications and retailer prices

From £589 GBP
$790 USD
As of November 2, 2026
Save £22 GBP (4%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £611 GBP at Jared · As of November 2, 2026
View at Jared

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 I1 clarity (included) and certified by GIA 6237886517. Listed at 3 retailers as of November 2, 2026, with a relatively tight 4% spread, which is unusual at this carat range and suggests competitive pricing across the listings. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.51
Carat
H
Colour
I1
Clarity
-
Cut

Specifications

Cut
PolishGood
SymmetryGood
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6237886517
Dimensions7.33 × 4.46 × 2.81 mm
L/W Ratio1.64
Top View
7.33 mm4.46 mm0.51 ctH / I1
OriginNatural
PolishGood
SymmetryGood
FluorescenceNone
CertificateGIA 6237886517
Side View
Table 54.0%CrownGirdle: STK-ETKPavilionCulet: NoneDepth 63.0%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: £611 GBP|Low: £589 GBP|High: £695 GBP|Avg: £611 GBP
Jared
Retailer 2
Retailer 3
Retailer 4
July 13, 2026
Retailer 3£589 GBP
Retailer 4£589 GBP
Jared£611 GBP
Retailer 2£695 GBP

7 data points across 4 retailers

3 retailers£589 GBP to £611 GBP

B
Cheapest Retailer
-
£589 GBP
$790 USD
B
Retailer 2
-
£589 GBP
$790 USD
View
Most Expensive
C
Jared
158157806 · Nov 2
£611 GBP
$820 USD
View
2 more retailers have this diamond
Prices start from £589 GBPSave up to £22 GBP

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.

B
0.51ct Marquise
£589 GBP