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Radiant|Natural|GIA

1.21ct F SI2 Radiant Natural Diamond

EX • F/SI2 • GIA 1528227650

Certificate GIA 1528227650

Diamond specifications and retailer prices

From $4,688 NZD
As of November 6, 2026
Save $5,706 NZD (55%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $10,394 NZD at MOH London · As of November 7, 2026
View at MOH London

About this 1.21ct natural radiant diamond

This 1.21ct natural radiant sits in the classic one-carat band, graded F colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1528227650. Listed at 12 retailers as of November 6, 2026, with prices from $4,688 to $10,394, a $5,706 spread on the same certified stone. MOH London lists it at $10,394. 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
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.2°
Pavilion angle31.98°
OriginNatural
Grading LabGIA
CertificateGIA 1528227650
Dimensions7.28 × 5.44 × 3.46 mm
L/W Ratio1.34
Girdle conditionThick
Key to symbols
Crystal, Feather, Needle
Top View
7.28 mm5.44 mm1.21 ctF / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1528227650
Side View
Table 71.0%Crown 44.2°Girdle: STK-THKPavilion 31.98°Culet: NoneDepth 63.6%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $10,394 NZD|Low: $4,688 NZD|High: $12,570 NZD|Avg: $6,889 NZD|+16.9%
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
Retailer 14
Retailer 15
November 7, 2026
Retailer 4$4,688 NZD
Retailer 15$4,930 NZD
Retailer 13$5,085 NZD
Retailer 5$5,195 NZD
Retailer 14$5,466 NZD
Retailer 7$5,942 NZD
Retailer 2$6,184 NZD
Retailer 9$6,557 NZD
Retailer 8$6,649 NZD
Retailer 10$6,664 NZD
Retailer 12$7,387 NZD
Retailer 11$7,452 NZD
Retailer 3$10,307 NZD
MOH London$10,394 NZD
Retailer 6$12,570 NZD

30 data points across 15 retailers

12 retailers$4,688 NZD to $10,394 NZD

A
Cheapest Retailer
-
$4,688 NZD
A
Retailer 2
-
$4,930 NZD
View
A
Retailer 3
-
$5,085 NZD
View
Final sale: no returns
Retailer 4
-
$5,195 NZD
View
Price last confirmed 9 days ago
B+
Retailer 5
-
$5,466 NZD
View
B+
Retailer 6
-
$6,184 NZD
View
B+
Retailer 7
-
$6,557 NZD
View
B
Retailer 8
-
$6,649 NZD
View
B
Retailer 9
-
$6,664 NZD
View
B
Retailer 10
-
$7,387 NZD
View
B
Retailer 11
-
$7,452 NZD
View
Most Expensive
B
MOH London
F612B9A96 · Nov 7
$10,394 NZD
£4,537 GBP
View
11 more retailers have this diamond
Prices start from $4,688 NZDSave up to $5,706 NZD

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
$4,688 NZD