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Heart|Natural|GIA

1.31ct I SI1 Heart Natural Diamond

EX • I/SI1 • GIA 6531769899

Certificate GIA 6531769899

Diamond specifications and retailer prices

From $2,927 SGD
As of November 6, 2026
Save $3,914 SGD (57%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $8,047 SGD at NZ Jewellers · As of September 25, 2026
View at NZ Jewellers

About this 1.31ct natural heart diamond

This 1.31ct natural heart sits in the one-and-a-quarter to one-and-a-half 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 6531769899. Listed at 20 retailers as of November 5, 2026, with a 134% 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

1.31
Carat
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.07°
Pavilion angle38.95°
OriginNatural
Grading LabGIA
CertificateGIA 6531769899
Dimensions6.66 × 7.59 × 4.49 mm
L/W Ratio1.14
Top View
6.66 mm7.59 mm1.31 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6531769899
Side View
Table 60.0%Crown 39.07°Girdle: MED-THKPavilion 38.95°Culet: NoneDepth 59.1%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $6,841 SGD|Low: $2,927 SGD|High: $8,047 SGD|Avg: $4,259 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
November 7, 2026
Retailer 9$2,927 SGD
Retailer 5$3,353 SGD
Retailer 15$3,517 SGD
Retailer 14$3,623 SGD
Retailer 13$3,819 SGD
Retailer 7$3,849 SGD
Retailer 16$3,927 SGD
Retailer 2$4,059 SGD
Retailer 4$4,078 SGD
Retailer 12$4,109 SGD
Retailer 8$4,111 SGD
Retailer 3$4,419 SGD
Retailer 6$4,530 SGD
Retailer 10$4,793 SGD
Retailer 11$6,549 SGD
NZ Jewellers$6,841 SGD

33 data points across 16 retailers

20 retailers$2,927 SGD to $6,841 SGD

A
Cheapest Retailer
-
$2,927 SGD
A
Retailer 2
-
$3,353 SGD
View
A
Retailer 3
-
$3,517 SGD
View
A
Retailer 4
-
$3,564 SGD
View
A
Retailer 5
-
$3,623 SGD
View
Final sale: no returns
B+
Retailer 6
-
$3,819 SGD
View
Retailer 7
-
$3,849 SGD
View
Price last confirmed 46 days ago
Retailer 8
-
$3,849 SGD
View
Price last confirmed 9 days ago
A
Retailer 9
-
$3,927 SGD
View
B+
Retailer 10
-
$4,059 SGD
View
B+
Retailer 11
-
$4,078 SGD
View
B+
Retailer 12
-
$4,109 SGD
View
Retailer 13
-
$4,111 SGD
View
Price last confirmed 31 days ago
B+
Retailer 14
-
$4,419 SGD
View
Retailer 15
-
$4,441 SGD
View
Price last confirmed 44 days ago
B+
Retailer 16
-
$4,530 SGD
View
B+
Retailer 17
-
$4,793 SGD
View
B
Retailer 18
-
$6,549 SGD
View
B
Retailer 19
-
$6,841 SGD
View
Most Expensive
NZ Jewellers
95c02344-1a40-4209-bdc5-fe4540743353 · Sep 25
$8,047 SGD
$6,279 USD
View
Price last confirmed 42 days ago
19 more retailers have this diamond
Prices start from $2,927 SGDSave up to $3,914 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.

A
1.31ct Heart
$2,927 SGD