Radiant|Natural|GIA

1.21ct I SI1 Radiant Natural Diamond

EX • I/SI1 • GIA 1448552241

Certificate GIA 1448552241

Diamond specifications and retailer prices

From $8,643 NZD
$4,863 USD
As of November 1, 2026
Save $4,797 NZD (36%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $18,296 NZD at NZ Jewellers · As of September 28, 2026
View at NZ Jewellers

About this 1.21ct natural radiant diamond

This 1.21ct natural radiant sits in the classic one-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1448552241. Listed at 16 retailers as of October 31, 2026, with a 55% 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
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryGood
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1448552241
Dimensions7.08 × 5.58 × 3.82 mm
L/W Ratio1.27
Top View
7.08 mm5.58 mm1.21 ctI / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryGood
FluorescenceNone
CertificateGIA 1448552241
Side View
Table 69.0%CrownGirdle: STK-ETKPavilionCulet: NoneDepth 68.4%

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 1
Current: $10,671 NZD|Low: $8,643 NZD|High: $16,310 NZD|Avg: $11,516 NZD|-0.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 7$8,643 NZD
Retailer 10$9,910 NZD
Retailer 8$10,182 NZD
Retailer 4$10,494 NZD
Retailer 1$10,671 NZD
Retailer 9$10,746 NZD
Retailer 6$11,955 NZD
Retailer 2$12,064 NZD
Retailer 5$13,440 NZD
Retailer 3$16,116 NZD

32 data points across 10 retailers

16 retailers$8,643 NZD to $13,440 NZD

B
Cheapest Retailer
-
$8,643 NZD
$4,863 USD
B
Retailer 2
-
$9,791 NZD
$5,509 USD
View
Retailer 3
-
$9,910 NZD
$5,576 USD
View
Price last confirmed 35 days ago
B
Retailer 4
-
$10,182 NZD
$5,729 USD
View
B
Retailer 5
-
$10,494 NZD
£4,649 GBP
View
B
Retailer 6
-
$10,671 NZD
£4,727 GBP
View
Retailer 7
-
$10,746 NZD
A$9,302 AUD
View
Price last confirmed 35 days ago
B
Retailer 8
-
$10,913 NZD
$6,140 USD
View
B
Retailer 9
-
$10,913 NZD
$6,140 USD
View
B
Retailer 10
-
$11,268 NZD
$6,340 USD
View
Retailer 11
-
$11,435 NZD
$6,434 USD
View
Price last confirmed 35 days ago
B
Retailer 12
-
$11,955 NZD
€6,406 EUR
View
Retailer 13
-
$12,064 NZD
$6,788 USD
View
Price last confirmed 10 days ago
B
Retailer 14
-
$13,440 NZD
ZAR 122,164 ZAR
View
Retailer 15
-
$16,116 NZD
£7,140 GBP
View
Price under review
Most Expensive
NZ Jewellers
c912433b-c587-4a8d-bdf2-f60c249c3acd · Sep 28
$18,296 NZD
$10,294 USD
View
Price under review
15 more retailers have this diamond
Prices start from $8,643 NZDSave up to $4,797 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.

B
1.21ct Radiant
$8,643 NZD