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Round|Lab Grown|IGI

1.51ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG770643638

Shape and cutting style on the report: Round brilliant

Certificate IGI LG770643638

Diamond specifications and retailer prices

From $318 SGD
As of November 4, 2026
Save $1,303 SGD (80%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $1,814 SGD at Brilliant Earth · As of October 16, 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 F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG770643638 or 770643638. Listed at 22 retailers as of November 4, 2026, with a 410% 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
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.1°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG770643638
Dimensions7.36 × 7.31 × 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
7.36 mm7.31 mm1.51 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG770643638
Side View
Table 56.0%Crown 35.1°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.3%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 4
Current: $1,814 SGD|Low: $272 SGD|High: $1,814 SGD|Avg: $797 SGD
Brilliant Earth
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
Retailer 15
Retailer 16
Retailer 17
Retailer 18
November 6, 2026
Retailer 9$286 SGD
Retailer 16$318 SGD
Retailer 5$354 SGD
Retailer 17$354 SGD
Retailer 3$556 SGD
Retailer 6$604 SGD
Retailer 2$613 SGD
Retailer 11$646 SGD
Retailer 12$651 SGD
Retailer 4$678 SGD
Retailer 18$737 SGD
Retailer 14$932 SGD
Retailer 10$1,139 SGD
Retailer 15$1,143 SGD
Retailer 8$1,206 SGD
Retailer 13$1,415 SGD
Retailer 7$1,621 SGD
Brilliant Earth$1,814 SGD

41 data points across 18 retailers

22 retailers$318 SGD to $1,621 SGD

Retailer 1
-
$286 SGD
Price last confirmed 19 days ago
A
Retailer 2
-
$318 SGD
View
Final sale: no returns
Retailer 3
-
$328 SGD
View
Price last confirmed 24 days ago
A
Retailer 4
-
$332 SGD
View
Retailer 5
-
$354 SGD
View
Price last confirmed 12 days ago
Retailer 6
-
$354 SGD
View
Price last confirmed 21 days ago
A
Retailer 7
-
$556 SGD
View
A
Retailer 8
-
$604 SGD
View
A
Retailer 9
-
$613 SGD
View
A
Retailer 10
-
$646 SGD
View
A
Retailer 11
-
$651 SGD
View
B+
Retailer 12
-
$678 SGD
View
B+
Retailer 13
-
$737 SGD
View
B+
Retailer 14
-
$932 SGD
View
B
Retailer 15
-
$985 SGD
View
Retailer 16
-
$1,129 SGD
View
Price last confirmed 46 days ago
Retailer 17
-
$1,139 SGD
View
Price last confirmed 19 days ago
B
Retailer 18
-
$1,143 SGD
View
B
Retailer 19
-
$1,206 SGD
View
B
Retailer 20
-
$1,415 SGD
View
B
Retailer 21
-
$1,621 SGD
View
Most Expensive
Brilliant Earth
19882042A · Oct 16
$1,814 SGD
$1,420 USD
View
Price last confirmed 21 days ago
21 more retailers have this diamond
Prices start from $318 SGDSave up to $1,303 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
$318 SGD