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Round|Natural|GIA

1.30ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 1553137824

Certificate GIA 1553137824

Diamond specifications and retailer prices

From $2,371 SGD
As of November 6, 2026
Save $3,145 SGD (57%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $6,628 SGD at NZ Jewellers · As of October 23, 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1553137824. Listed at 13 retailers as of November 4, 2026, with a 133% 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
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 1553137824
Dimensions6.87 × 6.94 × 4.32 mm
L/W Ratio1.01
Girdle conditionFaceted
Top View
6.87 mm6.94 mm1.30 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 1553137824
Side View
Table 58.0%Crown 36°Girdle: Slightly ThickPavilion 40.8°Culet: NoneDepth 62.5%

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: $6,628 SGD|Low: $2,354 SGD|High: $6,720 SGD|Avg: $3,770 SGD|-1.4%
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
November 6, 2026
Retailer 3$2,371 SGD
Retailer 12$2,893 SGD
Retailer 8$2,899 SGD
Retailer 5$2,912 SGD
Retailer 2$3,005 SGD
Retailer 6$3,299 SGD
Retailer 4$3,302 SGD
Retailer 7$3,304 SGD
Retailer 10$3,834 SGD
Retailer 9$3,894 SGD
Retailer 13$4,831 SGD
Retailer 11$5,515 SGD
NZ Jewellers$6,628 SGD

30 data points across 13 retailers

13 retailers$2,371 SGD to $5,515 SGD

A
Cheapest Retailer
-
$2,371 SGD
A
Retailer 2
-
$2,893 SGD
View
A
Retailer 3
-
$2,899 SGD
View
Final sale: no returns
A
Retailer 4
-
$2,912 SGD
View
A
Retailer 5
-
$3,005 SGD
View
A
Retailer 6
-
$3,299 SGD
View
A
Retailer 7
-
$3,302 SGD
View
A
Retailer 8
-
$3,304 SGD
View
B+
Retailer 9
-
$3,834 SGD
View
B+
Retailer 10
-
$3,894 SGD
View
B+
Retailer 11
-
$4,831 SGD
View
B
Retailer 12
-
$5,515 SGD
View
Most Expensive
NZ Jewellers
18fc6ffb-5f84-40f0-8655-db590685a699 · Oct 23
$6,628 SGD
$5,189 USD
View
Price last confirmed 13 days ago
12 more retailers have this diamond
Prices start from $2,371 SGDSave up to $3,145 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
$2,371 SGD