CaratHunter
Plans
Emerald|Natural|GIA

0.51ct H SI1 Emerald Natural Diamond

EX • H/SI1 • GIA 6542465909

Certificate GIA 6542465909

Diamond specifications and retailer prices

From £314 GBP
$421 USD
As of October 29, 2026
Save £477 GBP (60%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £791 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 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 6542465909. Listed at 16 retailers as of October 29, 2026, with prices from £314 to £791, a £477 spread on the same certified stone. MOH London lists it at £791. 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
H
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6542465909
Dimensions5.27 × 3.84 × 2.62 mm
L/W Ratio1.37
Top View
5.27 mm3.84 mm0.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6542465909
Side View
Table 66.0%CrownGirdle: ThickPavilionCulet: NDepth 68.3%

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 29
Current: £791 GBP|Low: £294 GBP|High: £1,332 GBP|Avg: £519 GBP|-6.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
October 31, 2026
Retailer 4£314 GBP
Retailer 17£341 GBP
Retailer 5£367 GBP
Retailer 13£367 GBP
Retailer 16£393 GBP
Retailer 9£405 GBP
Retailer 11£424 GBP
Retailer 12£427 GBP
Retailer 14£489 GBP
Retailer 8£492 GBP
Retailer 15£496 GBP
Retailer 7£503 GBP
Retailer 2£516 GBP
Retailer 10£526 GBP
Retailer 6£557 GBP
MOH London£791 GBP
Retailer 3£1,307 GBP

39 data points across 17 retailers

16 retailers£314 GBP to £791 GBP

A
Cheapest Retailer
-
£314 GBP
$421 USD
Final sale: no returns
A
Retailer 2
-
£341 GBP
$457 USD
View
B+
Retailer 3
-
£367 GBP
$492 USD
View
A
Retailer 4
-
£367 GBP
$492 USD
View
B+
Retailer 5
-
£393 GBP
$527 USD
View
B+
Retailer 6
-
£424 GBP
View
B+
Retailer 7
-
£427 GBP
View
B
Retailer 8
-
£489 GBP
$655 USD
View
Retailer 9
-
£492 GBP
$659 USD
View
Price last confirmed 16 days ago
B
Retailer 10
-
£496 GBP
$665 USD
View
B
Retailer 11
-
£503 GBP
$674 USD
View
B+
Retailer 12
-
£516 GBP
€658 EUR
View
B
Retailer 13
-
£526 GBP
ZAR 11,389 ZAR
View
Retailer 14
-
£557 GBP
A$1,148 AUD
View
Price last confirmed 28 days ago
Most Expensive
B
MOH London
ABBE5E4C0 · Oct 29
£791 GBP
View
14 more retailers have this diamond
Prices start from £314 GBPSave up to £477 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 Emerald
£314 GBP