Oval|Lab Grown|IGI

0.51ct D SI1 Oval Lab Grown Diamond

ID • D/SI1 • IGI LG831609122

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG831609122

Diamond specifications and retailer prices

From €115 EUR
HK$1,000 HKD
As of October 30, 2026
Save €235 EUR (67%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: €697 EUR at MOH London · As of October 19, 2026
View at MOH London

About this 0.51ct lab-grown oval diamond

This 0.51ct lab-grown oval sits in the half to three-quarter carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG831609122 or 831609122. Listed at 14 retailers as of October 28, 2026, with a 205% 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
D
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle30°
Pavilion angle38.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG831609122
Dimensions6.86 × 4.42 × 2.62 mm
L/W Ratio1.55
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.86 mm4.42 mm0.51 ctD / SI1
OriginLab Grown
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG831609122
Side View
Table 60.0%Crown 30°Girdle: STK-THKPavilion 38.8°Culet: NoneDepth 59.3%

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 30
Current: €697 EUR|Low: €73 EUR|High: €701 EUR|Avg: €229 EUR|+0.3%
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
October 27, 2026
Retailer 5€76 EUR
Retailer 4€85 EUR
Retailer 11€89 EUR
Retailer 7€100 EUR
Retailer 8€115 EUR
Retailer 13€157 EUR
Retailer 9€161 EUR
Retailer 14€180 EUR
Retailer 12€201 EUR
Retailer 16€202 EUR
Retailer 3€241 EUR
Retailer 6€273 EUR
Retailer 10€303 EUR
Retailer 15€303 EUR
Retailer 2€349 EUR
MOH London€697 EUR

37 data points across 16 retailers

14 retailers€115 EUR to €349 EUR

Retailer 1
-
€76 EUR
$85 USD
Price last confirmed 13 days ago
Retailer 2
-
€89 EUR
$99 USD
View
Price last confirmed 8 days ago
Retailer 3
-
€100 EUR
$112 USD
View
Price last confirmed 13 days ago
A
Retailer 4
-
€115 EUR
HK$1,000 HKD
View
Retailer 5
-
€157 EUR
$175 USD
View
Price last confirmed 13 days ago
A
Retailer 6
-
€161 EUR
£142 GBP
View
B+
Retailer 7
-
€201 EUR
$224 USD
View
Retailer 8
-
€202 EUR
$226 USD
View
Price last confirmed 14 days ago
Retailer 9
-
€241 EUR
£212 GBP
View
Price last confirmed 9 days ago
Retailer 10
-
€273 EUR
SGD 412 SGD
View
Price last confirmed 8 days ago
B+
Retailer 11
-
€303 EUR
$339 USD
View
B+
Retailer 12
-
€303 EUR
$339 USD
View
B+
Retailer 13
-
€349 EUR
$390 USD
View
Most Expensive
MOH London
LG831609122 · Oct 19
€697 EUR
£613 GBP
View
Price last confirmed 13 days ago
13 more retailers have this diamond
Prices start from €115 EURSave up to €235 EUR

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 Oval
€115 EUR