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Round|Lab Grown|IGI

1.21ct F VS1 Round Lab Grown Diamond

ID • F/VS1 • IGI LG737509208

Shape and cutting style on the report: Round brilliant

Certificate IGI LG737509208

Diamond specifications and retailer prices

From $178 USD
As of November 1, 2026
Save $858 USD (83%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $1,036 USD at MOH London · As of October 29, 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 VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG737509208 or 737509208. Listed at 20 retailers as of October 29, 2026, with prices from $178 to $1,036, a $858 spread on the same certified stone. MOH London lists it at $1,036. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.21
Carat
F
Color
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.8°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG737509208
Dimensions6.87 × 6.84 × 4.20 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
6.87 mm6.84 mm1.21 ctF / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG737509208
Side View
Table 59.0%Crown 33.8°Girdle: MED-STKPavilion 41.1°Culet: NoneDepth 61.3%

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: $1,036 USD|Low: $178 USD|High: $1,086 USD|Avg: $505 USD|-3.5%
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
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Retailer 17
November 2, 2026
Retailer 16$178 USD
Retailer 15$206 USD
Retailer 9$221 USD
Retailer 13$381 USD
Retailer 5$391 USD
Retailer 4$392 USD
Retailer 11$395 USD
Retailer 10$410 USD
Retailer 17$468 USD
Retailer 14$505 USD
Retailer 12$538 USD
Retailer 2$560 USD
Retailer 3$650 USD
Retailer 8$709 USD
Retailer 6$763 USD
Retailer 7$793 USD
MOH London$1,036 USD

44 data points across 17 retailers

20 retailers$178 USD to $1,036 USD

A
Cheapest Retailer
-
$178 USD
A
Retailer 2
-
$206 USD
View
A
Retailer 3
-
$221 USD
View
Retailer 4
-
$230 USD
View
Price last confirmed 8 days ago
A
Retailer 5
-
$381 USD
ZAR 6,149 ZAR
View
A
Retailer 6
-
$391 USD
View
B+
Retailer 7
-
$392 USD
View
A
Retailer 8
-
$395 USD
£311 GBP
View
A
Retailer 9
-
$410 USD
€390 EUR
View
Retailer 10
-
$457 USD
A$703 AUD
View
Price last confirmed 123 days ago
B+
Retailer 11
-
$468 USD
View
B+
Retailer 12
-
$505 USD
View
B+
Retailer 13
-
$538 USD
A$827 AUD
View
B+
Retailer 14
-
$560 USD
View
B+
Retailer 15
-
$650 USD
View
Retailer 16
-
$705 USD
View
Price last confirmed 47 days ago
B
Retailer 17
-
$709 USD
View
B
Retailer 18
-
$763 USD
View
B
Retailer 19
-
$793 USD
View
Most Expensive
B
MOH London
LG737509208 · Oct 29
$1,036 USD
£816 GBP
View
19 more retailers have this diamond
Prices start from $178 USDSave up to $858 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
$178 USD