Marquise|Lab Grown|IGI

1.21ct F VS1 Marquise Lab Grown Diamond

GD • F/VS1 • IGI LG839691553

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG839691553

Diamond specifications and retailer prices

From $214 USD
As of November 1, 2026
Save $1,186 USD (85%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $1,400 USD at Helzberg Diamonds · As of November 3, 2026
View at Helzberg Diamonds

About this 1.21ct lab-grown marquise diamond

This 1.21ct lab-grown marquise sits in the classic one-carat band, graded F colour (colourless) and VS1 clarity (very-slightly-included), with a standard cut grade and certified by IGI LG839691553 or 839691553. Listed at 5 retailers as of November 1, 2026, with prices from $214 to $1,400, a $1,186 spread on the same certified stone. Helzberg Diamonds lists it at $1,400. 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
VS1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.3°
Pavilion angle38.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG839691553
Dimensions11.38 × 5.49 × 3.46 mm
L/W Ratio2.07
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.38 mm5.49 mm1.21 ctF / VS1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG839691553
Side View
Table 58.0%Crown 34.3°Girdle: MED-STKPavilion 38.7°Culet: NoneDepth 63.0%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 1
Current: $1,400 USD|Low: $212 USD|High: $1,400 USD|Avg: $774 USD
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 3, 2026
Retailer 4$214 USD
Retailer 2$449 USD
Retailer 5$665 USD
Retailer 3$850 USD
Helzberg Diamonds$1,400 USD

32 data points across 5 retailers

5 retailers$214 USD to $1,400 USD

A
Cheapest Retailer
-
$214 USD
Final sale: no returns
B+
Retailer 2
-
$449 USD
£353 GBP
View
Retailer 3
-
$665 USD
View
Price last confirmed 33 days ago
B
Retailer 4
-
$850 USD
View
Most Expensive
C
Helzberg Diamonds
ZXZOJPMPHLLJ · Nov 3
$1,400 USD
View
4 more retailers have this diamond
Prices start from $214 USDSave up to $1,186 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 Marquise
$214 USD