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Round|Lab Grown|IGI

0.51ct D SI2 Round Lab Grown Diamond

ID • D/SI2 • IGI LG677571662

Shape and cutting style on the report: Round brilliant

Certificate IGI LG677571662

Diamond specifications and retailer prices

From $177 AUD
As of November 3, 2026
Save $1,650 AUD (90%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $1,827 AUD at MOH London · As of November 2, 2026
View at MOH London

About this 0.51ct lab-grown round diamond

This 0.51ct lab-grown round sits in the half to three-quarter carat band, graded D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG677571662 or 677571662. Listed at 13 retailers as of November 2, 2026, with prices from $177 to $1,827, a $1,650 spread on the same certified stone. MOH London lists it at $1,827. 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
Colour
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.4°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG677571662
Dimensions5.10 × 5.15 × 3.16 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
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
5.10 mm5.15 mm0.51 ctD / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG677571662
Side View
Table 59.0%Crown 35.4°Girdle: MediumPavilion 40.9°Culet: NoneDepth 61.6%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 3
Current: $1,827 AUD|Low: $176 AUD|High: $1,836 AUD|Avg: $483 AUD|+0.8%
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
November 4, 2026
Retailer 3$177 AUD
Retailer 9$196 AUD
Retailer 11$204 AUD
Retailer 10$233 AUD
Retailer 14$233 AUD
Retailer 2$250 AUD
Retailer 5$357 AUD
Retailer 8$404 AUD
Retailer 13$421 AUD
Retailer 7$437 AUD
Retailer 6$464 AUD
Retailer 12$544 AUD
Retailer 4$703 AUD
Retailer 15$784 AUD
MOH London$1,827 AUD

24 data points across 15 retailers

13 retailers$177 AUD to $1,827 AUD

A
Cheapest Retailer
-
$177 AUD
A
Retailer 2
-
$196 AUD
View
Final sale: no returns
A
Retailer 3
-
$204 AUD
View
A
Retailer 4
-
$233 AUD
View
Retailer 5
-
$233 AUD
View
Price last confirmed 12 days ago
A
Retailer 6
-
$250 AUD
View
B+
Retailer 7
-
$357 AUD
View
B+
Retailer 8
-
$404 AUD
View
B+
Retailer 9
-
$421 AUD
View
B+
Retailer 10
-
$544 AUD
View
Retailer 11
-
$703 AUD
View
Price last confirmed 13 days ago
B
Retailer 12
-
$784 AUD
View
Most Expensive
B
MOH London
LG677571662 · Nov 2
$1,827 AUD
£1,007 GBP
View
12 more retailers have this diamond
Prices start from $177 AUDSave up to $1,650 AUD

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 Round
$177 AUD