CaratHunter
Plans
Round|Lab Grown|IGI

0.51ct F I1 Round Lab Grown Diamond

EX • F/I1 • IGI LG816670138

Shape and cutting style on the report: Round brilliant

Certificate IGI LG816670138

Diamond specifications and retailer prices

From $114 AUD
$80 USD
As of November 1, 2026
Save $931 AUD (89%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $1,046 AUD at MOH London · As of November 1, 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 F colour (colourless) and I1 clarity (included), with a top-tier cut grade and certified by IGI LG816670138 or 816670138. Listed at 9 retailers as of November 1, 2026, with prices from $114 to $1,046, a $931 spread on the same certified stone. MOH London lists it at $1,046. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

0.51
Carat
F
Colour
I1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle35.2°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816670138
Dimensions5.07 × 5.13 × 3.09 mm
L/W Ratio1.01
Girdle conditionFaceted
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
5.07 mm5.13 mm0.51 ctF / I1
OriginLab Grown
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG816670138
Side View
Table 61.0%Crown 35.2°Girdle: Slightly ThickPavilion 40.2°Culet: NoneDepth 60.4%

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: Nov 1
Current: $1,046 AUD|Low: $114 AUD|High: $1,051 AUD|Avg: $355 AUD|-0.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 1, 2026
Retailer 9$114 AUD
Retailer 5$133 AUD
Retailer 3$151 AUD
Retailer 7$151 AUD
Retailer 8$310 AUD
Retailer 4$458 AUD
Retailer 2$509 AUD
Retailer 6$584 AUD
MOH London$1,046 AUD

7 data points across 9 retailers

9 retailers$114 AUD to $1,046 AUD

A
Cheapest Retailer
-
$114 AUD
$80 USD
B+
Retailer 2
-
$133 AUD
$93 USD
View
B+
Retailer 3
-
$151 AUD
$106 USD
View
Retailer 4
-
$151 AUD
$106 USD
View
Price last confirmed 8 days ago
B+
Retailer 5
-
$310 AUD
$217 USD
View
B+
Retailer 6
-
$458 AUD
$321 USD
View
B+
Retailer 7
-
$509 AUD
$357 USD
View
B+
Retailer 8
-
$584 AUD
$409 USD
View
Most Expensive
B
MOH London
LG816670138 · Nov 1
$1,046 AUD
£577 GBP
View
8 more retailers have this diamond
Prices start from $114 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
$114 AUD