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1.21ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG567369590

Shape and cutting style on the report: Round brilliant

Certificate IGI LG567369590

Diamond specifications and retailer prices

From $294 NZD
As of November 5, 2026
Save $1,403 NZD (83%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $1,697 NZD at MOH London · As of November 4, 2026
View at MOH London

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 LG567369590 or 567369590. Listed at 17 retailers as of November 4, 2026, with prices from $294 to $1,697, a $1,403 spread on the same certified stone. MOH London lists it at $1,697. 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 angle35.3°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG567369590
Dimensions6.85 × 6.81 × 4.23 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
6.85 mm6.81 mm1.21 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG567369590
Side View
Table 57.5%Crown 35.3°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.0%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $1,697 NZD|Low: $281 NZD|High: $1,722 NZD|Avg: $797 NZD|-1.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 7$294 NZD
Retailer 8$365 NZD
Retailer 9$498 NZD
Retailer 4$630 NZD
Retailer 2$637 NZD
Retailer 3$703 NZD
Retailer 10$808 NZD
Retailer 5$1,199 NZD
Retailer 6$1,236 NZD
MOH London$1,697 NZD

44 data points across 10 retailers

17 retailers$294 NZD to $1,697 NZD

A
Cheapest Retailer
-
$294 NZD
A
Retailer 2
-
$327 NZD
View
Final sale: no returns
A
Retailer 3
-
$340 NZD
View
A
Retailer 4
-
$365 NZD
View
Retailer 5
-
$365 NZD
View
Price last confirmed 12 days ago
A
Retailer 6
-
$409 NZD
View
B+
Retailer 7
-
$498 NZD
View
A
Retailer 8
-
$630 NZD
View
A
Retailer 9
-
$637 NZD
View
A
Retailer 10
-
$660 NZD
View
A
Retailer 11
-
$703 NZD
View
Retailer 12
-
$801 NZD
View
Price last confirmed 47 days ago
B+
Retailer 13
-
$808 NZD
View
B
Retailer 14
-
$1,171 NZD
View
B
Retailer 15
-
$1,199 NZD
View
B
Retailer 16
-
$1,236 NZD
View
Most Expensive
B
MOH London
LG567369590 · Nov 4
$1,697 NZD
£751 GBP
View
16 more retailers have this diamond
Prices start from $294 NZDSave up to $1,403 NZD

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
$294 NZD