Emerald|Lab Grown|IGI

0.51ct G SI1 Emerald Lab Grown Diamond

ID • G/SI1 • IGI LG758555865

Shape and cutting style on the report: Emerald cut

Certificate IGI LG758555865

Diamond specifications and retailer prices

From $120 USD
As of October 29, 2026
Save $414 USD (78%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $1,246 USD at MOH London · As of October 29, 2026
View at MOH London

About this 0.51ct lab-grown emerald diamond

This 0.51ct lab-grown 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 and certified by IGI LG758555865 or 758555865. Listed at 15 retailers as of October 29, 2026, with a 345% 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
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle37.5°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG758555865
Dimensions5.34 × 3.71 × 2.63 mm
L/W Ratio1.44
Culet sizeLarge
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
5.34 mm3.71 mm0.51 ctG / SI1
OriginLab Grown
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG758555865
Side View
Table 64.0%Crown 37.5°Girdle: ThickPavilion 40.7°Culet: LargeDepth 70.9%

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: $1,246 USD|Low: $115 USD|High: $1,253 USD|Avg: $353 USD|+0.5%
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
October 31, 2026
Retailer 12$120 USD
Retailer 4$139 USD
Retailer 3$158 USD
Retailer 14$158 USD
Retailer 13$210 USD
Retailer 10$215 USD
Retailer 8$250 USD
Retailer 9$268 USD
Retailer 2$305 USD
Retailer 7$325 USD
Retailer 6$417 USD
Retailer 5$452 USD
Retailer 15$477 USD
Retailer 11$532 USD
MOH London$1,246 USD

45 data points across 15 retailers

15 retailers$120 USD to $534 USD

A
Cheapest Retailer
-
$120 USD
A
Retailer 2
-
$139 USD
View
B+
Retailer 3
-
$158 USD
View
B+
Retailer 4
-
$158 USD
View
B+
Retailer 5
-
$210 USD
View
B+
Retailer 6
-
$215 USD
View
B+
Retailer 7
-
$250 USD
View
B+
Retailer 8
-
$268 USD
€255 EUR
View
B
Retailer 9
-
$305 USD
£240 GBP
View
B
Retailer 10
-
$417 USD
SGD 563 SGD
View
B
Retailer 11
-
$452 USD
View
B
Retailer 12
-
$477 USD
View
B
Retailer 13
-
$532 USD
View
B
Retailer 14
-
$534 USD
View
Most Expensive
MOH London
LG758555865 · Oct 29
$1,246 USD
£981 GBP
View
Price under review
14 more retailers have this diamond
Prices start from $120 USDSave up to $414 USD

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
$120 USD