Emerald|Natural|GIA

0.51ct G SI1 Emerald Natural Diamond

EX • G/SI1 • GIA 2557408109

Certificate GIA 2557408109

Diamond specifications and retailer prices

From £381 GBP
$510 USD
As of October 31, 2026
Save £573 GBP (60%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £1,295 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

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 2557408109. Listed at 14 retailers as of October 31, 2026, with a 151% 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
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2557408109
Dimensions5.15 × 3.72 × 2.62 mm
L/W Ratio1.38
Culet sizeNone
Top View
5.15 mm3.72 mm0.51 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2557408109
Side View
Table 62.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 70.4%

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: £1,295 GBP|Low: £349 GBP|High: £1,295 GBP|Avg: £605 GBP
NZ Jewellers
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
November 1, 2026
Retailer 4£381 GBP
Retailer 14£413 GBP
Retailer 3£445 GBP
Retailer 11£445 GBP
Retailer 13£476 GBP
Retailer 2£507 GBP
Retailer 12£517 GBP
Retailer 8£522 GBP
Retailer 5£560 GBP
Retailer 9£614 GBP
Retailer 6£621 GBP
Retailer 10£637 GBP
Retailer 7£954 GBP
NZ Jewellers£1,295 GBP

32 data points across 14 retailers

14 retailers£381 GBP to £954 GBP

A
Cheapest Retailer
-
£381 GBP
$510 USD
Final sale: no returns
B+
Retailer 2
-
£413 GBP
$553 USD
View
B+
Retailer 3
-
£445 GBP
$596 USD
View
B+
Retailer 4
-
£445 GBP
$596 USD
View
B+
Retailer 5
-
£476 GBP
$638 USD
View
B+
Retailer 6
-
£507 GBP
View
B+
Retailer 7
-
£517 GBP
View
B+
Retailer 8
-
£522 GBP
View
B+
Retailer 9
-
£560 GBP
$750 USD
View
B+
Retailer 10
-
£614 GBP
€784 EUR
View
Retailer 11
-
£621 GBP
A$1,280 AUD
View
Price last confirmed 29 days ago
B
Retailer 12
-
£637 GBP
ZAR 13,796 ZAR
View
B
Retailer 13
-
£954 GBP
View
Most Expensive
NZ Jewellers
99b69c18-8084-4b64-a681-0e04de0ab1e0 · Oct 30
£1,295 GBP
$1,735 USD
View
Price under review
13 more retailers have this diamond
Prices start from £381 GBPSave up to £573 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
£381 GBP