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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 $161 USD
As of November 1, 2026
Save $770 USD (83%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $931 USD 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 $161 to $931, a $770 spread on the same certified stone. MOH London lists it at $931. 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
Color
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

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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 1
Current: $931 USD|Low: $152 USD|High: $958 USD|Avg: $411 USD|-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$161 USD
Retailer 11$180 USD
Retailer 5$198 USD
Retailer 4$199 USD
Retailer 2$346 USD
Retailer 8$347 USD
Retailer 13$359 USD
Retailer 3$369 USD
Retailer 12$449 USD
Retailer 6$450 USD
Retailer 7$544 USD
Retailer 9$550 USD
MOH London$931 USD

36 data points across 13 retailers

13 retailers$161 USD to $931 USD

A
Cheapest Retailer
-
$161 USD
A
Retailer 2
-
$180 USD
View
Final sale: no returns
Retailer 3
-
$198 USD
View
Price last confirmed 52 days ago
Retailer 4
-
$199 USD
View
Price last confirmed 12 days ago
B+
Retailer 5
-
$346 USD
View
B+
Retailer 6
-
$347 USD
View
B
Retailer 7
-
$359 USD
View
B+
Retailer 8
-
$369 USD
View
B+
Retailer 9
-
$449 USD
View
B+
Retailer 10
-
$450 USD
View
B
Retailer 11
-
$544 USD
View
B
Retailer 12
-
$550 USD
View
Most Expensive
B
MOH London
LG763668397 · Nov 1
$931 USD
£733 GBP
View
12 more retailers have this diamond
Prices start from $161 USDSave up to $770 USD

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
$161 USD