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Round|Lab Grown|IGI

1.51ct D SI1 Round Lab Grown Diamond

EX • D/SI1 • IGI LG770669393

Shape and cutting style on the report: Round brilliant

Certificate IGI LG770669393

Diamond specifications and retailer prices

From $319 AUD
As of November 5, 2026
Save $1,424 AUD (82%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $1,743 AUD at Brilliant Earth · As of November 5, 2026
View at Brilliant Earth

About this 1.51ct lab-grown round diamond

This 1.51ct lab-grown round sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG770669393 or 770669393. Listed at 15 retailers as of November 5, 2026, with prices from $319 to $1,743, a $1,424 spread on the same certified stone. Brilliant Earth lists it at $1,743. 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

1.51
Carat
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.8°
Pavilion angle41.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG770669393
Dimensions7.35 × 7.30 × 4.56 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.35 mm7.30 mm1.51 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG770669393
Side View
Table 60.0%Crown 34.8°Girdle: MED-STKPavilion 41.6°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: Nov 5
Current: $1,743 AUD|Low: $306 AUD|High: $1,743 AUD|Avg: $884 AUD|+0.8%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 9$319 AUD
Retailer 10$394 AUD
Retailer 8$529 AUD
Retailer 3$610 AUD
Retailer 2$661 AUD
Retailer 4$724 AUD
Retailer 5$1,079 AUD
Retailer 6$1,093 AUD
Retailer 7$1,581 AUD
Brilliant Earth$1,743 AUD

43 data points across 10 retailers

15 retailers$319 AUD to $1,743 AUD

A
Cheapest Retailer
-
$319 AUD
A
Retailer 2
-
$369 AUD
View
Retailer 3
-
$394 AUD
View
Price last confirmed 12 days ago
A
Retailer 4
-
$394 AUD
View
B+
Retailer 5
-
$529 AUD
View
A
Retailer 6
-
$610 AUD
View
A
Retailer 7
-
$639 AUD
View
A
Retailer 8
-
$661 AUD
View
A
Retailer 9
-
$724 AUD
View
B+
Retailer 10
-
$863 AUD
View
B
Retailer 11
-
$1,079 AUD
View
B+
Retailer 12
-
$1,093 AUD
View
B
Retailer 13
-
$1,267 AUD
View
Retailer 14
-
$1,581 AUD
View
Price last confirmed 12 days ago
Most Expensive
B
Brilliant Earth
20482981A · Nov 5
$1,743 AUD
$1,220 USD
View
14 more retailers have this diamond
Prices start from $319 AUDSave up to $1,424 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
1.51ct Round
$319 AUD