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Round|Lab Grown|IGI

1.20ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG499107349

Shape and cutting style on the report: Round brilliant

Certificate IGI LG499107349

Diamond specifications and retailer prices

From $611 AUD
$429 USD
As of October 27, 2026
Save $1,665 AUD (73%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $2,276 AUD at Reve Diamonds · As of October 25, 2026
View at Reve Diamonds

About this 1.2ct lab-grown round diamond

This 1.2ct lab-grown round sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG499107349 or 499107349. Listed at 10 retailers as of October 25, 2026, with prices from $611 to $2,276, a $1,665 spread on the same certified stone. Reve Diamonds lists it at $2,276. 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

1.20
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG499107349
Dimensions6.79 × 6.75 × 4.23 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
6.79 mm6.75 mm1.20 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG499107349
Side View
Table 56.0%Crown 34.9°Girdle: MED-STKPavilion 40.7°Culet: NoneDepth 62.5%

Caratlytics Score

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

Price History

Last verified: Oct 27
Current: $1,023 AUD|Low: $370 AUD|High: $2,341 AUD|Avg: $1,019 AUD|+4.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Reve Diamonds
October 27, 2026
Retailer 3$466 AUD
Retailer 12$520 AUD
Retailer 2$569 AUD
Retailer 9$577 AUD
Retailer 4$611 AUD
Retailer 8$776 AUD
Retailer 11$797 AUD
Retailer 7$804 AUD
Retailer 10$925 AUD
Retailer 1$1,023 AUD
Retailer 6$1,693 AUD
Reve Diamonds$2,276 AUD
Retailer 5$2,316 AUD

26 data points across 13 retailers

10 retailers$611 AUD to $2,276 AUD

B+
Cheapest Retailer
-
$611 AUD
$429 USD
B+
Retailer 2
-
$776 AUD
$545 USD
View
B+
Retailer 3
-
$797 AUD
$560 USD
View
Retailer 4
-
$804 AUD
$565 USD
View
Price last confirmed 12 days ago
B
Retailer 5
-
$925 AUD
$650 USD
View
B
Retailer 6
-
$1,023 AUD
£566 GBP
View
B
Retailer 7
-
$1,693 AUD
$1,189 USD
View
Retailer 8
-
$1,855 AUD
$1,303 USD
View
Price last confirmed 33 days ago
B
Retailer 9
-
$1,918 AUD
$1,348 USD
View
Most Expensive
B
Reve Diamonds
CC94F2FBE · Oct 25
$2,276 AUD
$1,599 USD
View
9 more retailers have this diamond
Prices start from $611 AUDSave up to $1,665 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+
1.20ct Round
$611 AUD