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Round|Natural|GIA

1.28ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 3555600029

Certificate GIA 3555600029

Diamond specifications and retailer prices

From HK$20,840 HKD
As of November 6, 2026
Save HK$27,870 HKD (57%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: HK$48,709 HKD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.28ct natural round diamond

This 1.28ct natural round sits in the one-and-a-quarter to one-and-a-half carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 3555600029. Listed at 21 retailers as of November 5, 2026, with prices from HK$20,840 to HK$48,709, a HK$27,870 spread on the same certified stone. NZ Jewellers lists it at HK$48,709. 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

1.28
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 3555600029
Dimensions6.94 × 6.97 × 4.27 mm
L/W Ratio1.00
Culet sizeNone
Key to symbols
Twinning Wisp, Cloud, Crystal, Feather, Needle, Indented Natural
Top View
6.94 mm6.97 mm1.28 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 3555600029
Side View
Table 58.0%Crown 35°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 61.4%

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$28,748 HKD|Low: HK$20,840 HKD|High: HK$47,244 HKD|Avg: HK$30,034 HKD|-0.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 7, 2026
Retailer 2HK$20,840 HKD
Retailer 7HK$20,863 HKD
Retailer 9HK$24,022 HKD
Retailer 3HK$26,749 HKD
Retailer 1HK$28,748 HKD
Retailer 8HK$29,821 HKD
Retailer 4HK$32,478 HKD
Retailer 5HK$34,124 HKD
Retailer 6HK$46,625 HKD

26 data points across 9 retailers

21 retailersHK$20,840 HKD to HK$48,709 HKD

A
Cheapest Retailer
-
HK$20,840 HKD
A
Retailer 2
-
HK$20,863 HKD
View
A
Retailer 3
-
HK$24,022 HKD
View
A
Retailer 4
-
HK$24,821 HKD
View
A
Retailer 5
-
HK$25,801 HKD
View
Final sale: no returns
A
Retailer 6
-
HK$26,749 HKD
View
A
Retailer 7
-
HK$26,882 HKD
View
Retailer 8
-
HK$27,956 HKD
View
Price last confirmed 9 days ago
B+
Retailer 9
-
HK$27,956 HKD
View
A
Retailer 10
-
HK$28,748 HKD
View
B+
Retailer 11
-
HK$29,022 HKD
View
B+
Retailer 12
-
HK$29,030 HKD
View
B+
Retailer 13
-
HK$29,092 HKD
View
B+
Retailer 14
-
HK$29,821 HKD
View
Retailer 15
-
HK$29,939 HKD
View
Price last confirmed 30 days ago
B+
Retailer 16
-
HK$32,259 HKD
View
B+
Retailer 17
-
HK$32,478 HKD
View
B+
Retailer 18
-
HK$34,124 HKD
View
B
Retailer 19
-
HK$46,625 HKD
View
Retailer 20
-
HK$47,479 HKD
View
Price last confirmed 67 days ago
Most Expensive
B
NZ Jewellers
3a3018ef-e528-4962-97d6-8518516e0f75 · Nov 5
HK$48,709 HKD
$6,215 USD
View
20 more retailers have this diamond
Prices start from HK$20,840 HKDSave up to HK$27,870 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
1.28ct Round
HK$20,840 HKD