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Emerald|Natural|GIA

0.51ct G SI1 Emerald Natural Diamond

EX • G/SI1 • GIA 1236882186

Certificate GIA 1236882186

Diamond specifications and retailer prices

From £363 GBP
$486 USD
As of October 31, 2026
Save £582 GBP (62%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £1,174 GBP at Diamond Exchange Canada · As of October 30, 2026
View at Diamond Exchange Canada

About this 0.51ct natural emerald diamond

This 0.51ct natural emerald sits in the half to three-quarter carat band, graded G 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 1236882186. Listed at 7 retailers as of October 31, 2026, with a 161% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1236882186
Dimensions5.39 × 3.97 × 2.69 mm
L/W Ratio1.36
Girdle conditionPolished
Key to symbols
Feather
Top View
5.39 mm3.97 mm0.51 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1236882186
Side View
Table 62.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 67.8%

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 31
Current: £1,174 GBP|Low: £363 GBP|High: £1,468 GBP|Avg: £762 GBP|-20.0%
Diamond Exchange Canada
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 1, 2026
Retailer 7£363 GBP
Retailer 6£453 GBP
Retailer 5£513 GBP
Retailer 3£522 GBP
Retailer 4£558 GBP
Retailer 2£945 GBP
Diamond Exchange Canada£1,174 GBP

40 data points across 7 retailers

7 retailers£363 GBP to £945 GBP

A
Cheapest Retailer
-
£363 GBP
$486 USD
B+
Retailer 2
-
£453 GBP
$607 USD
View
B+
Retailer 3
-
£513 GBP
View
B+
Retailer 4
-
£522 GBP
View
B
Retailer 5
-
£558 GBP
€712 EUR
View
B
Retailer 6
-
£945 GBP
View
Most Expensive
Diamond Exchange Canada
1966850474 · Oct 30
£1,174 GBP
CA$2,185 CAD
View
Price under review
6 more retailers have this diamond
Prices start from £363 GBPSave up to £582 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
£363 GBP