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Radiant|Lab Grown|GIA

1.21ct F SI1 Radiant Lab Grown Diamond

ID • F/SI1 • GIA 1505842159

Certificate GIA 1505842159

Diamond specifications and retailer prices

From ₹36,535 INR
As of November 6, 2026
Save ₹1,07,538 INR (75%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: ₹1,74,624 INR at MOH London · As of November 5, 2026
View at MOH London

About this 1.21ct lab-grown radiant diamond

This 1.21ct lab-grown radiant sits in the classic one-carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1505842159. Listed at 5 retailers as of November 6, 2026, with a 294% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
F
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabGIA
CertificateGIA 1505842159
Dimensions7.58 × 5.33 × 3.60 mm
L/W Ratio1.42
Girdle conditionPolished
Cert comments
This is a man-made diamond produced by CVD (Chemical Vapor Deposition) growth process and has evidence of post-growth treatments to change the color.
Key to symbols
Growth Remnant
Top View
7.58 mm5.33 mm1.21 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1505842159
Side View
Table 66.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 67.6%

Caratlytics Score

How it works →
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 6
Current: ₹1,74,624 INR|Low: ₹36,535 INR|High: ₹1,77,128 INR|Avg: ₹96,195 INR|-1.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
November 7, 2026
Retailer 4₹36,535 INR
Retailer 2₹72,788 INR
Retailer 3₹84,528 INR
MOH London₹1,74,624 INR

42 data points across 4 retailers

5 retailers₹36,535 INR to ₹1,44,073 INR

A
Cheapest Retailer
-
₹36,535 INR
Final sale: no returns
B+
Retailer 2
-
₹72,788 INR
View
B
Retailer 3
-
₹84,528 INR
View
B
Retailer 4
-
₹1,44,073 INR
View
Most Expensive
MOH London
1505842159 · Nov 5
₹1,74,624 INR
£1,464 GBP
View
Price under review
4 more retailers have this diamond
Prices start from ₹36,535 INRSave up to ₹1,07,538 INR

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 Radiant
₹36,535 INR