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Round|Lab Grown|IGI

1.21ct H SI1 Round Lab Grown Diamond

ID • H/SI1 • IGI LG817652948

Shape and cutting style on the report: Round brilliant

Certificate IGI LG817652948

Diamond specifications and retailer prices

From $291 SGD
As of November 4, 2026
Save $399 SGD (58%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $1,330 SGD at Reve Diamonds · As of October 25, 2026
View at Reve Diamonds

About this 1.21ct lab-grown round diamond

This 1.21ct lab-grown round sits in the classic one-carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG817652948 or 817652948. Listed at 16 retailers as of November 4, 2026, with a 137% 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

1.21
Carat
H
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle34.9°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG817652948
Dimensions6.86 × 6.82 × 4.14 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.86 mm6.82 mm1.21 ctH / SI1
OriginLab Grown
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG817652948
Side View
Table 60.0%Crown 34.9°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 60.5%

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 4
Current: $378 SGD|Low: $193 SGD|High: $1,819 SGD|Avg: $696 SGD|-22.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Reve Diamonds
November 6, 2026
Retailer 10$193 SGD
Retailer 9$291 SGD
Retailer 4$333 SGD
Retailer 1$378 SGD
Retailer 7$493 SGD
Retailer 6$507 SGD
Retailer 5$524 SGD
Retailer 2$658 SGD
Retailer 8$690 SGD
Retailer 11$764 SGD
Retailer 3$1,133 SGD
Reve Diamonds$1,330 SGD

34 data points across 12 retailers

16 retailers$291 SGD to $690 SGD

Retailer 1
-
$234 SGD
Price last confirmed 27 days ago
Retailer 2
-
$272 SGD
View
Price last confirmed 28 days ago
Retailer 3
-
$290 SGD
View
Price last confirmed 27 days ago
B+
Retailer 4
-
$291 SGD
View
A
Retailer 5
-
$333 SGD
View
A
Retailer 6
-
$378 SGD
View
A
Retailer 7
-
$493 SGD
View
A
Retailer 8
-
$507 SGD
View
A
Retailer 9
-
$524 SGD
View
Retailer 10
-
$575 SGD
View
Price last confirmed 11 days ago
Retailer 11
-
$658 SGD
View
Price last confirmed 11 days ago
A
Retailer 12
-
$690 SGD
View
Retailer 13
-
$764 SGD
View
Price last confirmed 10 days ago
Retailer 14
-
$934 SGD
View
Price last confirmed 28 days ago
Retailer 15
-
$1,133 SGD
View
Price last confirmed 16 days ago
Most Expensive
Reve Diamonds
CA45F42F7 · Oct 25
$1,330 SGD
$1,041 USD
View
Price last confirmed 12 days ago
15 more retailers have this diamond
Prices start from $291 SGDSave up to $399 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 Round
$291 SGD