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Radiant|Lab Grown|IGI

1.21ct D SI1 Radiant Lab Grown Diamond

ID • D/SI1 • IGI LG786693953

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG786693953

Diamond specifications and retailer prices

From $177 SGD
$138 USD
As of October 27, 2026
Save $1,362 SGD (89%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $1,539 SGD at Brilliant Earth · As of October 28, 2026
View at Brilliant Earth

About this 1.21ct lab-grown radiant diamond

This 1.21ct lab-grown radiant 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 LG786693953 or 786693953. Listed at 18 retailers as of October 27, 2026, with prices from $177 to $1,539, a $1,362 spread on the same certified stone. Brilliant Earth lists it at $1,539. 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

1.21
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41.5°
Pavilion angle34.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG786693953
Dimensions7.40 × 5.30 × 3.57 mm
L/W Ratio1.40
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.40 mm5.30 mm1.21 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG786693953
Side View
Table 63.0%Crown 41.5°Girdle: MediumPavilion 34.9°Culet: NoneDepth 67.4%

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: Oct 27
Current: $1,539 SGD|Low: $297 SGD|High: $1,590 SGD|Avg: $692 SGD|-3.2%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 29, 2026
Retailer 9$297 SGD
Retailer 4$370 SGD
Retailer 5$382 SGD
Retailer 3$426 SGD
Retailer 8$544 SGD
Retailer 6$744 SGD
Retailer 7$891 SGD
Retailer 2$1,029 SGD
Brilliant Earth$1,539 SGD

40 data points across 9 retailers

18 retailers$177 SGD to $1,539 SGD

A
Cheapest Retailer
-
$177 SGD
$138 USD
A
Retailer 2
-
$205 SGD
$160 USD
View
A
Retailer 3
-
$219 SGD
$171 USD
View
A
Retailer 4
-
$219 SGD
$171 USD
View
A
Retailer 5
-
$263 SGD
HK$1,600 HKD
View
B+
Retailer 6
-
$297 SGD
$232 USD
View
A
Retailer 7
-
$370 SGD
£227 GBP
View
A
Retailer 8
-
$382 SGD
€284 EUR
View
A
Retailer 9
-
$426 SGD
£262 GBP
View
A
Retailer 10
-
$544 SGD
$424 USD
View
A
Retailer 11
-
$549 SGD
$428 USD
View
B+
Retailer 12
-
$704 SGD
$549 USD
View
B+
Retailer 13
-
$738 SGD
View
B+
Retailer 14
-
$744 SGD
$580 USD
View
B+
Retailer 15
-
$775 SGD
$604 USD
View
B+
Retailer 16
-
$891 SGD
$695 USD
View
Price last confirmed 24 days ago
B+
Retailer 17
-
$1,029 SGD
£632 GBP
View
Most Expensive
B
Brilliant Earth
19047263A · Oct 28
$1,539 SGD
$1,200 USD
View
17 more retailers have this diamond
Prices start from $177 SGDSave up to $1,362 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
1.21ct Radiant
$177 SGD