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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 HK$30,495 HKD
As of November 6, 2026
Save HK$35,582 HKD (54%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: HK$75,020 HKD 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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: HK$34,728 HKD|Low: HK$30,495 HKD|High: HK$70,396 HKD|Avg: HK$42,303 HKD|-3.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 4, 2026
Retailer 4HK$30,495 HKD
Retailer 1HK$34,728 HKD
Retailer 5HK$36,303 HKD
Retailer 7HK$38,991 HKD
Retailer 6HK$39,077 HKD
Retailer 8HK$41,961 HKD
Retailer 2HK$45,857 HKD
Retailer 3HK$66,077 HKD

39 data points across 8 retailers

15 retailersHK$30,495 HKD to HK$66,077 HKD

A
Cheapest Retailer
-
HK$30,495 HKD
A
Retailer 2
-
HK$34,728 HKD
View
A
Retailer 3
-
HK$36,303 HKD
View
A
Retailer 4
-
HK$38,991 HKD
View
Final sale: no returns
Retailer 5
-
HK$39,077 HKD
View
Price last confirmed 11 days ago
B+
Retailer 6
-
HK$41,961 HKD
View
Retailer 7
-
HK$42,988 HKD
View
Price last confirmed 30 days ago
Retailer 8
-
HK$43,356 HKD
View
Price last confirmed 39 days ago
Retailer 9
-
HK$43,356 HKD
View
Price last confirmed 38 days ago
Retailer 10
-
HK$44,109 HKD
View
Price last confirmed 59 days ago
B+
Retailer 11
-
HK$45,857 HKD
View
B
Retailer 12
-
HK$66,077 HKD
View
Retailer 13
-
HK$71,892 HKD
View
Price last confirmed 31 days ago
Retailer 14
-
HK$73,146 HKD
View
Price last confirmed 41 days ago
Most Expensive
NZ Jewellers
ad511fe0-2f1f-423f-be00-3f64ba4482f6 · Sep 1
HK$75,020 HKD
$9,572 USD
View
Price last confirmed 66 days ago
14 more retailers have this diamond
Prices start from HK$30,495 HKDSave up to HK$35,582 HKD

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
HK$30,495 HKD