CaratHunter
Plans
Round|Natural|GIA

1.00ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 2558715221

Certificate GIA 2558715221

Diamond specifications and retailer prices

From HK$12,050 HKD
As of November 6, 2026
Save HK$16,075 HKD (57%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: HK$33,656 HKD at NZ Jewellers · As of October 3, 2026
View at NZ Jewellers

About this 1ct natural round diamond

This 1ct natural round sits in the classic one-carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2558715221. Listed at 20 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

1.00
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.5°
Pavilion angle41.8°
OriginNatural
Grading LabGIA
CertificateGIA 2558715221
Dimensions6.40 × 6.46 × 3.93 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Cloud, Feather
Top View
6.40 mm6.46 mm1.00 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2558715221
Side View
Table 61.0%Crown 33.5°Girdle: MED-STKPavilion 41.8°Culet: NoneDepth 61.1%

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$12,560 HKD|Low: HK$12,050 HKD|High: HK$28,541 HKD|Avg: HK$18,346 HKD|-3.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 7HK$12,050 HKD
Retailer 1HK$12,560 HKD
Retailer 5HK$14,835 HKD
Retailer 8HK$15,400 HKD
Retailer 2HK$17,385 HKD
Retailer 4HK$19,644 HKD
Retailer 3HK$21,818 HKD
Retailer 6HK$28,125 HKD

35 data points across 8 retailers

20 retailersHK$12,050 HKD to HK$28,125 HKD

A
Cheapest Retailer
-
HK$12,050 HKD
A
Retailer 2
-
HK$12,560 HKD
View
B+
Retailer 3
-
HK$14,835 HKD
View
B+
Retailer 4
-
HK$15,071 HKD
View
B+
Retailer 5
-
HK$15,102 HKD
View
B+
Retailer 6
-
HK$15,400 HKD
View
B+
Retailer 7
-
HK$16,083 HKD
View
Retailer 8
-
HK$16,098 HKD
View
Price last confirmed 39 days ago
Retailer 9
-
HK$16,098 HKD
View
Price last confirmed 28 days ago
Retailer 10
-
HK$16,098 HKD
View
Price last confirmed 25 days ago
B+
Retailer 11
-
HK$16,773 HKD
View
Retailer 12
-
HK$16,844 HKD
View
Price last confirmed 38 days ago
B+
Retailer 13
-
HK$17,181 HKD
View
B+
Retailer 14
-
HK$17,385 HKD
View
Retailer 15
-
HK$18,577 HKD
View
Price last confirmed 38 days ago
B+
Retailer 16
-
HK$19,644 HKD
View
B
Retailer 17
-
HK$21,818 HKD
View
B
Retailer 18
-
HK$28,125 HKD
View
Retailer 19
-
HK$33,656 HKD
View
Price last confirmed 39 days ago
Most Expensive
NZ Jewellers
7368ce97-3a06-415c-8add-e03809881242 · Oct 3
HK$33,656 HKD
$4,290 USD
View
Price last confirmed 34 days ago
19 more retailers have this diamond
Prices start from HK$12,050 HKDSave up to HK$16,075 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$12,050 HKD