CaratHunter
Plans
Round|Lab Grown|IGI

1.21ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG760578387

Shape and cutting style on the report: Round brilliant

Certificate IGI LG760578387

Diamond specifications and retailer prices

From $588 SGD
As of November 6, 2026
5 retailers carry this diamond
Most expensive: $756 SGD at NZ Jewellers · As of September 21, 2026
View at NZ Jewellers

About this 1.21ct lab-grown round diamond

This 1.21ct lab-grown round sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG760578387 or 760578387. Listed at 5 retailers as of November 6, 2026. 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
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG760578387
Dimensions6.81 × 6.76 × 4.20 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
6.81 mm6.76 mm1.21 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG760578387
Side View
Table 60.0%Crown 36°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 61.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $588 SGD|Low: $232 SGD|High: $1,100 SGD|Avg: $545 SGD
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 3, 2026
Retailer 9$232 SGD
Retailer 12$235 SGD
Retailer 6$382 SGD
Retailer 3$401 SGD
Retailer 4$418 SGD
Retailer 11$467 SGD
Retailer 8$533 SGD
Retailer 1$588 SGD
Retailer 5$594 SGD
Retailer 13$641 SGD
Retailer 10$741 SGD
Retailer 2$779 SGD
Retailer 7$1,100 SGD

2 data points across 13 retailers

5 retailers

Retailer 1
-
$190 SGD
Price last confirmed 45 days ago
Retailer 2
-
$232 SGD
View
Price last confirmed 45 days ago
B+
Retailer 3
-
$588 SGD
View
Retailer 4
-
$594 SGD
View
Price last confirmed 95 days ago
Most Expensive
NZ Jewellers
9c67793d-7da5-4ab2-98d4-ed1cb1733056 · Sep 21
$756 SGD
$592 USD
View
Price last confirmed 46 days ago
4 more retailers have this diamond
Prices start from $588 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.

B+
1.21ct Round
$588 SGD