CaratHunter
Plans
Marquise|Natural|GIA

0.51ct I IF Marquise Natural Diamond

GD • I/IF • GIA 2556513837

Certificate GIA 2556513837

Diamond specifications and retailer prices

From £537 GBP
MYR 2,934 MYR
As of October 30, 2026
Save £130 GBP (20%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £667 GBP at Blue Nile · As of October 31, 2026
View at Blue Nile

About this 0.51ct natural marquise diamond

This 0.51ct natural marquise sits in the half to three-quarter carat band, graded I colour (near-colourless) and IF clarity (flawless or internally-flawless), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 2556513837. Listed at 5 retailers as of October 30, 2026, with prices from £537 to £667, a £130 spread on the same certified stone. Blue Nile lists it at £667. 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
I
Colour
IF
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2556513837
Dimensions8.11 × 4.21 × 2.66 mm
L/W Ratio1.93
Culet sizeNone
Key to symbols
Minor Details of Polish
Top View
8.11 mm4.21 mm0.51 ctI / IF
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2556513837
Side View
Table 62.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 63.2%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £667 GBP|Low: £460 GBP|High: £705 GBP|Avg: £590 GBP|-5.4%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 1, 2026
Retailer 5£537 GBP
Retailer 4£540 GBP
Retailer 3£589 GBP
Retailer 2£637 GBP
Blue Nile£667 GBP

38 data points across 5 retailers

5 retailers£537 GBP to £667 GBP

A
Cheapest Retailer
-
£537 GBP
MYR 2,934 MYR
A
Retailer 2
-
£540 GBP
$724 USD
View
Final sale: no returns
A
Retailer 3
-
£589 GBP
$790 USD
View
B+
Retailer 4
-
£637 GBP
View
Most Expensive
B+
Blue Nile
29422953 · Oct 31
£667 GBP
$895 USD
View
4 more retailers have this diamond
Prices start from £537 GBPSave up to £130 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.

A
0.51ct Marquise
£537 GBP