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Round|Natural|GIA

1.00ct D SI1 Round Natural Diamond

EX • D/SI1 • GIA 2558368590

Certificate GIA 2558368590

Diamond specifications and retailer prices

From HK$18,672 HKD
As of November 6, 2026
Save HK$22,524 HKD (55%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: HK$48,397 HKD at NZ Jewellers · As of September 27, 2026
View at NZ Jewellers

About this 1ct natural round diamond

This 1ct natural round sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2558368590. Listed at 20 retailers as of November 4, 2026, with a 121% 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

1.00
Carat
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.5°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 2558368590
Dimensions6.46 × 6.42 × 3.92 mm
L/W Ratio1.01
Girdle conditionFaceted
Top View
6.46 mm6.42 mm1.00 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2558368590
Side View
Table 59.0%Crown 31.5°Girdle: Slightly ThickPavilion 41.6°Culet: NoneDepth 60.9%

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$27,050 HKD|Low: HK$18,577 HKD|High: HK$45,957 HKD|Avg: HK$26,699 HKD|-10.0%
Retailer 1
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 5, 2026
Retailer 15HK$18,672 HKD
Retailer 3HK$20,037 HKD
Retailer 16HK$20,374 HKD
Retailer 6HK$20,656 HKD
Retailer 17HK$20,696 HKD
Retailer 13HK$21,927 HKD
Retailer 9HK$22,163 HKD
Retailer 11HK$25,411 HKD
Retailer 2HK$25,497 HKD
Retailer 4HK$25,497 HKD
Retailer 5HK$26,360 HKD
Retailer 1HK$27,050 HKD
Retailer 14HK$29,278 HKD
Retailer 8HK$29,749 HKD
Retailer 7HK$29,969 HKD
Retailer 10HK$30,141 HKD
Retailer 12HK$41,195 HKD

30 data points across 17 retailers

20 retailersHK$18,672 HKD to HK$41,195 HKD

A
Cheapest Retailer
-
HK$18,672 HKD
A
Retailer 2
-
HK$20,037 HKD
View
A
Retailer 3
-
HK$20,374 HKD
View
A
Retailer 4
-
HK$20,656 HKD
View
Final sale: no returns
A
Retailer 5
-
HK$20,696 HKD
View
A
Retailer 6
-
HK$21,927 HKD
View
Retailer 7
-
HK$25,167 HKD
View
Price last confirmed 36 days ago
A
Retailer 8
-
HK$25,411 HKD
View
A
Retailer 9
-
HK$25,497 HKD
View
B+
Retailer 10
-
HK$25,497 HKD
View
Retailer 11
-
HK$26,132 HKD
View
Price last confirmed 38 days ago
B+
Retailer 12
-
HK$26,360 HKD
View
B+
Retailer 13
-
HK$27,050 HKD
View
Retailer 14
-
HK$29,035 HKD
View
Price last confirmed 38 days ago
B+
Retailer 15
-
HK$29,278 HKD
View
Retailer 16
-
HK$29,749 HKD
View
Price last confirmed 35 days ago
Retailer 17
-
HK$29,969 HKD
View
Price last confirmed 14 days ago
B+
Retailer 18
-
HK$30,141 HKD
View
B
Retailer 19
-
HK$41,195 HKD
View
Most Expensive
NZ Jewellers
edd1479b-0c61-4ddb-aba2-9fc4530b17a1 · Sep 27
HK$48,397 HKD
$6,169 USD
View
Price last confirmed 40 days ago
19 more retailers have this diamond
Prices start from HK$18,672 HKDSave up to HK$22,524 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
1.00ct Round
HK$18,672 HKD