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 $2,558 SGD
As of November 6, 2026
Save $4,612 SGD (64%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $7,171 SGD 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 $2,558 to $7,171, a $4,612 spread on the same certified stone. NZ Jewellers lists it at $7,171. 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: $7,171 SGD|Low: $2,526 SGD|High: $7,171 SGD|Avg: $3,920 SGD
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
Retailer 17
November 7, 2026
Retailer 14$2,558 SGD
Retailer 15$3,027 SGD
Retailer 5$3,072 SGD
Retailer 16$3,166 SGD
Retailer 3$3,377 SGD
Retailer 6$3,385 SGD
Retailer 7$3,430 SGD
Retailer 11$3,551 SGD
Retailer 4$3,562 SGD
Retailer 2$3,618 SGD
Retailer 8$3,790 SGD
Retailer 17$3,842 SGD
Retailer 9$3,927 SGD
Retailer 12$4,186 SGD
Retailer 10$4,259 SGD
Retailer 13$5,993 SGD
NZ Jewellers$7,171 SGD

44 data points across 17 retailers

20 retailers$2,558 SGD to $7,171 SGD

B+
Cheapest Retailer
-
$2,558 SGD
B+
Retailer 2
-
$3,027 SGD
View
B+
Retailer 3
-
$3,072 SGD
View
B
Retailer 4
-
$3,166 SGD
View
Final sale: no returns
B+
Retailer 5
-
$3,322 SGD
View
B+
Retailer 6
-
$3,377 SGD
View
Retailer 7
-
$3,430 SGD
View
Price last confirmed 9 days ago
B+
Retailer 8
-
$3,430 SGD
View
B
Retailer 9
-
$3,551 SGD
View
B
Retailer 10
-
$3,562 SGD
View
B
Retailer 11
-
$3,610 SGD
View
B+
Retailer 12
-
$3,618 SGD
View
B
Retailer 13
-
$3,790 SGD
View
Retailer 14
-
$3,842 SGD
View
Price last confirmed 31 days ago
B
Retailer 15
-
$3,927 SGD
View
B
Retailer 16
-
$3,958 SGD
View
B
Retailer 17
-
$4,186 SGD
View
B
Retailer 18
-
$4,259 SGD
View
B
Retailer 19
-
$5,993 SGD
View
Most Expensive
B
NZ Jewellers
f3b42846-f509-4876-a79d-a14152981848 · Nov 5
$7,171 SGD
$5,595 USD
View
19 more retailers have this diamond
Prices start from $2,558 SGDSave up to $4,612 SGD

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
$2,558 SGD