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Round|Natural|GIA

1.30ct D SI1 Round Natural Diamond

EX • D/SI1 • GIA 1558178921

Certificate GIA 1558178921

Diamond specifications and retailer prices

From $4,970 SGD
As of November 6, 2026
Save $5,799 SGD (54%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $12,226 SGD at NZ Jewellers · As of September 1, 2026
View at NZ Jewellers

About this 1.3ct natural round diamond

This 1.3ct natural round sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1558178921. Listed at 15 retailers as of November 2, 2026, with a 117% 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

1.30
Carat
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 1558178921
Dimensions6.89 × 6.94 × 4.37 mm
L/W Ratio1.01
Key to symbols
Crystal, Feather, Cloud, Needle, Natural
Top View
6.89 mm6.94 mm1.30 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1558178921
Side View
Table 55.0%CrownGirdle: THN-STKPavilion 40.6°Culet: NoneDepth 63.3%

Caratlytics Score

How it works →
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: $5,660 SGD|Low: $4,970 SGD|High: $11,473 SGD|Avg: $6,894 SGD|-3.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 4, 2026
Retailer 4$4,970 SGD
Retailer 1$5,660 SGD
Retailer 5$5,916 SGD
Retailer 7$6,355 SGD
Retailer 6$6,369 SGD
Retailer 8$6,839 SGD
Retailer 2$7,473 SGD
Retailer 3$10,769 SGD

39 data points across 8 retailers

15 retailers$4,970 SGD to $10,769 SGD

A
Cheapest Retailer
-
$4,970 SGD
A
Retailer 2
-
$5,660 SGD
View
A
Retailer 3
-
$5,916 SGD
View
A
Retailer 4
-
$6,355 SGD
View
Final sale: no returns
Retailer 5
-
$6,369 SGD
View
Price last confirmed 11 days ago
B+
Retailer 6
-
$6,839 SGD
View
Retailer 7
-
$7,006 SGD
View
Price last confirmed 30 days ago
Retailer 8
-
$7,066 SGD
View
Price last confirmed 39 days ago
Retailer 9
-
$7,066 SGD
View
Price last confirmed 38 days ago
Retailer 10
-
$7,189 SGD
View
Price last confirmed 59 days ago
B+
Retailer 11
-
$7,473 SGD
View
B
Retailer 12
-
$10,769 SGD
View
Retailer 13
-
$11,717 SGD
View
Price last confirmed 31 days ago
Retailer 14
-
$11,921 SGD
View
Price last confirmed 41 days ago
Most Expensive
NZ Jewellers
ad511fe0-2f1f-423f-be00-3f64ba4482f6 · Sep 1
$12,226 SGD
$9,572 USD
View
Price last confirmed 66 days ago
14 more retailers have this diamond
Prices start from $4,970 SGDSave up to $5,799 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
1.30ct Round
$4,970 SGD