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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 $657 AUD
As of November 6, 2026
5 retailers carry this diamond
Most expensive: $846 AUD 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
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Price History

Last verified: Nov 6
Current: $657 AUD|Low: $260 AUD|High: $1,230 AUD|Avg: $610 AUD
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$260 AUD
Retailer 12$263 AUD
Retailer 6$427 AUD
Retailer 3$449 AUD
Retailer 4$467 AUD
Retailer 11$523 AUD
Retailer 8$596 AUD
Retailer 1$657 AUD
Retailer 5$664 AUD
Retailer 13$717 AUD
Retailer 10$829 AUD
Retailer 2$871 AUD
Retailer 7$1,230 AUD

2 data points across 13 retailers

5 retailers

Retailer 1
-
$213 AUD
Price last confirmed 45 days ago
Retailer 2
-
$260 AUD
View
Price last confirmed 45 days ago
B+
Retailer 3
-
$657 AUD
View
Retailer 4
-
$664 AUD
View
Price last confirmed 95 days ago
Most Expensive
NZ Jewellers
9c67793d-7da5-4ab2-98d4-ed1cb1733056 · Sep 21
$846 AUD
$592 USD
View
Price last confirmed 46 days ago
4 more retailers have this diamond
Prices start from $657 AUD

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
$657 AUD