Radiant|Lab Grown|GIA

1.21ct F SI1 Radiant Lab Grown Diamond

F/SI1

Diamond specifications and retailer prices

From $619 USD
£487 GBP
As of November 2, 2026
1 retailer carries this diamond
Only listing: $619 USD at Moon Ocean
Only one retailer lists this diamond right now, and it is shown above, so there is nothing to unlock. Similar diamonds are carried by several retailers.
View at Moon Ocean

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) and certified by GIA. Listed at a single retailer as of November 2, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. 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
-
Cut

Specifications

Cut
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabGIA
Dimensions7.58 × 5.33 × 3.60 mm
L/W Ratio1.42
Top View
7.58 mm5.33 mm1.21 ctF / SI1
OriginLab Grown
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA
Side View
Table 66.0%CrownGirdlePavilionCuletDepth 67.6%

Caratlytics Score

How it works →
B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $619 USD|Low: $618 USD|High: $1,973 USD|Avg: $1,362 USD|-0.1%
Moon Ocean
Retailer 2
Retailer 3
November 2, 2026
Moon Ocean$619 USD
Retailer 2$1,534 USD
Retailer 3$1,973 USD

38 data points across 3 retailers

1 retailer

B
Moon Ocean
NVL-B827DE3C4-159 · Nov 2
$619 USD
£487 GBP
View

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.

B
1.21ct Radiant
$619 USD