Radiant|Lab Grown|IGI

0.51ct D VS2 Radiant Lab Grown Diamond

EX • D/VS2 • IGI LG817666161

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG817666161

Diamond specifications and retailer prices

From $198 USD
As of October 30, 2026
Save $235 USD (54%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $1,223 USD at MOH London · As of October 29, 2026
View at MOH London

About this 0.51ct lab-grown radiant diamond

This 0.51ct lab-grown radiant sits in the half to three-quarter carat band, graded D colour (colourless) and VS2 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG817666161 or 817666161. Listed at 10 retailers as of October 30, 2026, with a 119% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

0.51
Carat
D
Color
VS2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle46.7°
Pavilion angle39.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG817666161
Dimensions5.49 × 3.96 × 2.79 mm
L/W Ratio1.39
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
5.49 mm3.96 mm0.51 ctD / VS2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG817666161
Side View
Table 65.0%Crown 46.7°Girdle: MediumPavilion 39.3°Culet: NoneDepth 70.5%

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: $1,223 USD|Low: $155 USD|High: $1,231 USD|Avg: $402 USD|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 31, 2026
Retailer 7$155 USD
Retailer 9$198 USD
Retailer 5$250 USD
Retailer 3$260 USD
Retailer 2$296 USD
Retailer 4$352 USD
Retailer 6$400 USD
Retailer 8$433 USD
MOH London$1,223 USD

44 data points across 9 retailers

10 retailers$198 USD to $433 USD

Retailer 1
-
$155 USD
Price last confirmed 15 days ago
A
Retailer 2
-
$198 USD
View
Retailer 3
-
$250 USD
View
Price last confirmed 12 days ago
B+
Retailer 4
-
$260 USD
€248 EUR
View
B+
Retailer 5
-
$296 USD
£233 GBP
View
B+
Retailer 6
-
$300 USD
A$462 AUD
View
B+
Retailer 7
-
$352 USD
£277 GBP
View
B+
Retailer 8
-
$400 USD
View
B
Retailer 9
-
$433 USD
View
Most Expensive
MOH London
LG817666161 · Oct 29
$1,223 USD
£963 GBP
View
Price under review
9 more retailers have this diamond
Prices start from $198 USDSave up to $235 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 Radiant
$198 USD