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Round|Lab Grown|IGI

1.20ct I SI1 Round Lab Grown Diamond

ID • I/SI1 • IGI LG499125822

Shape and cutting style on the report: Round brilliant

Certificate IGI LG499125822

Diamond specifications and retailer prices

From $755 AUD
$530 USD
As of October 28, 2026
Save $6,544 AUD (90%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $7,299 AUD at MOH London · As of October 29, 2026
View at MOH London

About this 1.2ct lab-grown round diamond

This 1.2ct lab-grown round sits in the classic one-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG499125822 or 499125822. Listed at 13 retailers as of October 28, 2026, with prices from $755 to $7,299, a $6,544 spread on the same certified stone. MOH London lists it at $7,299. 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
I
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.7°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG499125822
Dimensions6.74 × 6.80 × 4.22 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
6.74 mm6.80 mm1.20 ctI / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG499125822
Side View
Table 56.5%Crown 35.7°Girdle: THN-MEDPavilion 40.5°Culet: NoneDepth 62.2%

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: Oct 28
Current: $7,299 AUD|Low: $755 AUD|High: $7,357 AUD|Avg: $3,080 AUD|+0.5%
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
October 30, 2026
Retailer 9$755 AUD
Retailer 8$1,947 AUD
Retailer 13$2,120 AUD
Retailer 3$2,181 AUD
Retailer 10$2,259 AUD
Retailer 12$2,259 AUD
Retailer 4$2,506 AUD
Retailer 2$2,966 AUD
Retailer 5$3,075 AUD
Retailer 11$3,570 AUD
Retailer 7$3,860 AUD
Retailer 6$4,211 AUD
Retailer 14$4,235 AUD
MOH London$7,299 AUD

37 data points across 14 retailers

13 retailers$755 AUD to $7,299 AUD

A
Cheapest Retailer
-
$755 AUD
$530 USD
B+
Retailer 2
-
$1,947 AUD
$1,368 USD
View
B+
Retailer 3
-
$2,120 AUD
$1,489 USD
View
B+
Retailer 4
-
$2,181 AUD
$1,532 USD
View
Final sale: no returns
Retailer 5
-
$2,259 AUD
$1,587 USD
View
Price last confirmed 18 days ago
B+
Retailer 6
-
$2,259 AUD
$1,587 USD
View
B
Retailer 7
-
$2,506 AUD
$1,760 USD
View
B+
Retailer 8
-
$2,966 AUD
£1,641 GBP
View
B
Retailer 9
-
$3,570 AUD
$2,508 USD
View
B
Retailer 10
-
$3,860 AUD
€2,582 EUR
View
B
Retailer 11
-
$4,211 AUD
$2,958 USD
View
B
Retailer 12
-
$4,235 AUD
$2,975 USD
View
Most Expensive
B
MOH London
LG499125822 · Oct 29
$7,299 AUD
£4,037 GBP
View
12 more retailers have this diamond
Prices start from $755 AUDSave up to $6,544 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
1.20ct Round
$755 AUD