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Round|Lab Grown|IGI

0.51ct D SI1 Round Lab Grown Diamond

VG • D/SI1 • IGI LG803661808

Shape and cutting style on the report: Round brilliant

Certificate IGI LG803661808

Diamond specifications and retailer prices

From $182 AUD
HK$1,000 HKD
As of October 30, 2026
Save $931 AUD (84%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $1,114 AUD at MOH London · As of October 25, 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 SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG803661808 or 803661808. Listed at 14 retailers as of October 25, 2026, with prices from $182 to $1,114, a $931 spread on the same certified stone. MOH London lists it at $1,114. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.51
Carat
D
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle35.2°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG803661808
Dimensions5.11 × 5.06 × 3.09 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
5.11 mm5.06 mm0.51 ctD / SI1
OriginLab Grown
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG803661808
Side View
Table 62.0%Crown 35.2°Girdle: MED-THKPavilion 40.7°Culet: NoneDepth 60.9%

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 30
Current: $1,114 AUD|Low: $66 AUD|High: $1,137 AUD|Avg: $345 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
October 27, 2026
Retailer 4$66 AUD
Retailer 10$135 AUD
Retailer 3$142 AUD
Retailer 7$235 AUD
Retailer 5$255 AUD
Retailer 6$288 AUD
Retailer 9$323 AUD
Retailer 8$325 AUD
Retailer 12$434 AUD
Retailer 11$483 AUD
Retailer 2$512 AUD
MOH London$1,114 AUD

36 data points across 12 retailers

14 retailers$182 AUD to $1,114 AUD

Retailer 1
-
$122 AUD
$86 USD
Price last confirmed 13 days ago
Retailer 2
-
$142 AUD
$100 USD
View
Price last confirmed 11 days ago
Retailer 3
-
$161 AUD
$113 USD
View
Price last confirmed 12 days ago
B+
Retailer 4
-
$182 AUD
HK$1,000 HKD
View
Retailer 5
-
$235 AUD
$165 USD
View
Price last confirmed 13 days ago
A
Retailer 6
-
$255 AUD
£141 GBP
View
B+
Retailer 7
-
$288 AUD
€193 EUR
View
B+
Retailer 8
-
$323 AUD
$227 USD
View
Retailer 9
-
$325 AUD
$228 USD
View
Price last confirmed 13 days ago
Retailer 10
-
$434 AUD
SGD 412 SGD
View
Price last confirmed 7 days ago
B
Retailer 11
-
$483 AUD
$339 USD
View
Retailer 12
-
$487 AUD
$342 USD
View
Price last confirmed 13 days ago
B+
Retailer 13
-
$512 AUD
$360 USD
View
Most Expensive
B
MOH London
LG803661808 · Oct 25
$1,114 AUD
£616 GBP
View
13 more retailers have this diamond
Prices start from $182 AUDSave up to $931 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
$182 AUD