CaratHunter
Plans
Heart|Natural|GIA

1.21ct J SI1 Heart Natural Diamond

EX • J/SI1 • GIA 2508189179

Certificate GIA 2508189179

Diamond specifications and retailer prices

From $3,601 NZD
As of November 6, 2026
Save $6,492 NZD (64%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $10,093 NZD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.21ct natural heart diamond

This 1.21ct natural heart sits in the classic one-carat band, graded J 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 2508189179. Listed at 20 retailers as of November 5, 2026, with prices from $3,601 to $10,093, a $6,492 spread on the same certified stone. NZ Jewellers lists it at $10,093. 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
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2508189179
Dimensions6.69 × 7.23 × 4.20 mm
L/W Ratio1.08
Top View
6.69 mm7.23 mm1.21 ctJ / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 2508189179
Side View
Table 56.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 58.1%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $10,093 NZD|Low: $3,555 NZD|High: $10,093 NZD|Avg: $5,517 NZD
NZ Jewellers
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
Retailer 16
November 7, 2026
Retailer 13$3,601 NZD
Retailer 14$4,261 NZD
Retailer 5$4,324 NZD
Retailer 15$4,456 NZD
Retailer 3$4,753 NZD
Retailer 6$4,764 NZD
Retailer 7$4,827 NZD
Retailer 11$4,999 NZD
Retailer 4$5,013 NZD
Retailer 9$5,092 NZD
Retailer 8$5,334 NZD
Retailer 16$5,408 NZD
Retailer 12$5,892 NZD
Retailer 10$5,994 NZD
Retailer 2$8,412 NZD
NZ Jewellers$10,093 NZD

44 data points across 16 retailers

20 retailers$3,601 NZD to $10,093 NZD

B+
Cheapest Retailer
-
$3,601 NZD
B+
Retailer 2
-
$4,261 NZD
View
B+
Retailer 3
-
$4,324 NZD
View
B
Retailer 4
-
$4,456 NZD
View
Final sale: no returns
B+
Retailer 5
-
$4,676 NZD
View
B+
Retailer 6
-
$4,753 NZD
View
Retailer 7
-
$4,827 NZD
View
Price last confirmed 9 days ago
B+
Retailer 8
-
$4,827 NZD
View
B
Retailer 9
-
$4,999 NZD
View
B
Retailer 10
-
$5,013 NZD
View
B
Retailer 11
-
$5,082 NZD
View
B+
Retailer 12
-
$5,092 NZD
View
B
Retailer 13
-
$5,334 NZD
View
Retailer 14
-
$5,408 NZD
View
Price last confirmed 31 days ago
B
Retailer 15
-
$5,527 NZD
View
B
Retailer 16
-
$5,570 NZD
View
B
Retailer 17
-
$5,892 NZD
View
B
Retailer 18
-
$5,994 NZD
View
B
Retailer 19
-
$8,412 NZD
View
Most Expensive
B
NZ Jewellers
f3b42846-f509-4876-a79d-a14152981848 · Nov 5
$10,093 NZD
$5,595 USD
View
19 more retailers have this diamond
Prices start from $3,601 NZDSave up to $6,492 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 Heart
$3,601 NZD