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Round|Lab Grown|IGI

5.12ct G SI1 Round Lab Grown Diamond

ID • G/SI1

Diamond specifications and retailer prices

From $1,504 AUD
£832 GBP
As of November 1, 2026
Save $2,333 AUD (61%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $3,837 AUD at Rare Carat · As of November 1, 2026
View at Rare Carat

About this 5.12ct lab-grown round diamond

This 5.12ct lab-grown round sits in the over five carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI. Listed at 3 retailers as of November 1, 2026, with prices from $1,504 to $3,837, a $2,333 spread on the same certified stone. Rare Carat lists it at $3,837. 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

5.12
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
Dimensions10.97 × 11.04 × 6.82 mm
L/W Ratio1.01
Top View
10.97 mm11.04 mm5.12 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI
Side View
Table 57.0%CrownGirdle: Med.PavilionCulet: NoneDepth 62.0%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $3,837 AUD|Low: $1,041 AUD|High: $4,331 AUD|Avg: $2,475 AUD|-11.4%
Rare Carat
Retailer 2
Retailer 3
Retailer 4
November 1, 2026
Retailer 4$1,041 AUD
Retailer 2$1,504 AUD
Retailer 3$3,431 AUD
Rare Carat$3,837 AUD

40 data points across 4 retailers

3 retailers$1,504 AUD to $3,837 AUD

B+
Cheapest Retailer
-
$1,504 AUD
£832 GBP
B
Retailer 2
-
$3,431 AUD
CA$3,347 CAD
View
Most Expensive
B
Rare Carat
138509 · Nov 1
$3,837 AUD
$2,695 USD
View
2 more retailers have this diamond
Prices start from $1,504 AUDSave up to $2,333 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.

B+
5.12ct Round
$1,504 AUD