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Round|Lab Grown|IGI

1.21ct F SI1 Round Lab Grown Diamond

VG • F/SI1 • IGI LG763668397

Shape and cutting style on the report: Round brilliant

Certificate IGI LG763668397

Diamond specifications and retailer prices

From $290 NZD
As of November 1, 2026
Save $1,389 NZD (83%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $1,679 NZD at MOH London · As of November 1, 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 F colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG763668397 or 763668397. Listed at 13 retailers as of November 1, 2026, with prices from $290 to $1,679, a $1,389 spread on the same certified stone. MOH London lists it at $1,679. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.21
Carat
F
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryGood
FluorescenceNone
Crown angle36.1°
Pavilion angle39.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG763668397
Dimensions6.92 × 6.90 × 4.05 mm
L/W Ratio1.00
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
6.92 mm6.90 mm1.21 ctF / SI1
OriginLab Grown
CutVery Good
PolishVery Good
SymmetryGood
FluorescenceNone
CertificateIGI LG763668397
Side View
Table 60.0%Crown 36.1°Girdle: MED-STKPavilion 39.7°Culet: NoneDepth 58.7%

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 1
Current: $1,679 NZD|Low: $274 NZD|High: $1,727 NZD|Avg: $741 NZD|-2.8%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 6, 2026
Retailer 10$290 NZD
Retailer 11$325 NZD
Retailer 5$357 NZD
Retailer 4$359 NZD
Retailer 2$624 NZD
Retailer 8$626 NZD
Retailer 13$648 NZD
Retailer 3$666 NZD
Retailer 12$810 NZD
Retailer 6$812 NZD
Retailer 7$981 NZD
Retailer 9$992 NZD
MOH London$1,679 NZD

36 data points across 13 retailers

13 retailers$290 NZD to $1,679 NZD

A
Cheapest Retailer
-
$290 NZD
A
Retailer 2
-
$325 NZD
View
Final sale: no returns
Retailer 3
-
$357 NZD
View
Price last confirmed 53 days ago
Retailer 4
-
$359 NZD
View
Price last confirmed 13 days ago
B+
Retailer 5
-
$624 NZD
View
B+
Retailer 6
-
$626 NZD
View
B
Retailer 7
-
$648 NZD
View
B+
Retailer 8
-
$666 NZD
View
B+
Retailer 9
-
$810 NZD
View
B+
Retailer 10
-
$812 NZD
View
B
Retailer 11
-
$981 NZD
View
B
Retailer 12
-
$992 NZD
View
Most Expensive
B
MOH London
LG763668397 · Nov 1
$1,679 NZD
£733 GBP
View
12 more retailers have this diamond
Prices start from $290 NZDSave up to $1,389 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
$290 NZD