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Round|Lab Grown|IGI

1.51ct D SI1 Round Lab Grown Diamond

EX • D/SI1 • IGI LG731538751

Shape and cutting style on the report: Round brilliant

Certificate IGI LG731538751

Diamond specifications and retailer prices

From $268 SGD
As of November 5, 2026
Save $1,298 SGD (83%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $2,018 SGD at Brilliant Earth · As of October 18, 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 LG731538751 or 731538751. Listed at 20 retailers as of November 5, 2026, with a 484% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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 angle36°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG731538751
Dimensions7.31 × 7.27 × 4.58 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
7.31 mm7.27 mm1.51 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG731538751
Side View
Table 56.0%Crown 36°Girdle: THN-MEDPavilion 40.8°Culet: NoneDepth 62.8%

Caratlytics Score

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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: $2,018 SGD|Low: $258 SGD|High: $2,018 SGD|Avg: $735 SGD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 10$268 SGD
Retailer 3$333 SGD
Retailer 11$450 SGD
Retailer 2$516 SGD
Retailer 7$552 SGD
Retailer 4$608 SGD
Retailer 9$737 SGD
Retailer 8$812 SGD
Retailer 6$971 SGD
Retailer 5$1,331 SGD
Brilliant Earth$2,018 SGD

41 data points across 11 retailers

20 retailers$268 SGD to $1,566 SGD

A
Cheapest Retailer
-
$268 SGD
A
Retailer 2
-
$300 SGD
View
Final sale: no returns
A
Retailer 3
-
$312 SGD
View
Retailer 4
-
$333 SGD
View
Price last confirmed 12 days ago
A
Retailer 5
-
$333 SGD
View
B+
Retailer 6
-
$450 SGD
View
A
Retailer 7
-
$516 SGD
View
A
Retailer 8
-
$552 SGD
View
A
Retailer 9
-
$566 SGD
View
A
Retailer 10
-
$608 SGD
View
B+
Retailer 11
-
$659 SGD
View
B+
Retailer 12
-
$737 SGD
View
B+
Retailer 13
-
$812 SGD
View
B
Retailer 14
-
$971 SGD
View
B
Retailer 15
-
$1,072 SGD
View
Retailer 16
-
$1,075 SGD
View
Price last confirmed 9 days ago
B
Retailer 17
-
$1,138 SGD
View
B
Retailer 18
-
$1,331 SGD
View
B
Retailer 19
-
$1,566 SGD
View
Most Expensive
Brilliant Earth
16956960A · Oct 18
$2,018 SGD
$1,580 USD
View
Price last confirmed 18 days ago
19 more retailers have this diamond
Prices start from $268 SGDSave up to $1,298 SGD

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
$268 SGD