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Emerald|Natural|GIA

0.51ct I SI2 Emerald Natural Diamond

EX • I/SI2 • GIA 5231237389

Certificate GIA 5231237389

Diamond specifications and retailer prices

From £477 GBP
$639 USD
As of October 31, 2026
Save £415 GBP (47%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £892 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 0.51ct natural emerald diamond

This 0.51ct natural emerald sits in the half to three-quarter carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5231237389. Listed at 4 retailers as of October 29, 2026, with prices from £477 to £892, a £415 spread on the same certified stone. MOH London lists it at £892. 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

0.51
Carat
I
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5231237389
Dimensions5.33 × 3.94 × 2.57 mm
L/W Ratio1.35
Girdle conditionPolished
Key to symbols
Crystal
Top View
5.33 mm3.94 mm0.51 ctI / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 5231237389
Side View
Table 63.0%CrownGirdle: ThickPavilionCulet: NoneDepth 65.2%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: £892 GBP|Low: £455 GBP|High: £932 GBP|Avg: £548 GBP|-3.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 31, 2026
Retailer 4£477 GBP
Retailer 7£478 GBP
Retailer 2£481 GBP
Retailer 3£491 GBP
Retailer 6£493 GBP
Retailer 5£531 GBP
MOH London£892 GBP

42 data points across 7 retailers

4 retailers£477 GBP to £892 GBP

B+
Cheapest Retailer
-
£477 GBP
$639 USD
B
Retailer 2
-
£481 GBP
View
B
Retailer 3
-
£491 GBP
$658 USD
View
Most Expensive
B
MOH London
33A742B39 · Oct 29
£892 GBP
View
3 more retailers have this diamond
Prices start from £477 GBPSave up to £415 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 Emerald
£477 GBP