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1.55ct I SI2 Round Natural Diamond

EX • I/SI2 • IGI 780669607

Shape and cutting style on the report: Round brilliant

Certificate IGI 780669607

Diamond specifications and retailer prices

From HK$15,397 HKD
SGD 2,652 SGD
As of October 31, 2026
Save HK$25,408 HKD (62%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: HK$40,805 HKD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.55ct natural round diamond

This 1.55ct natural round sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI 780669607. Listed at 7 retailers as of October 30, 2026, with prices from HK$15,397 to HK$40,805, a HK$25,408 spread on the same certified stone. NZ Jewellers lists it at HK$40,805. 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

1.55
Carat
I
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle41.7°
OriginNatural
Grading LabIGI
CertificateIGI 780669607
Dimensions7.39 × 7.44 × 4.62 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Top View
7.39 mm7.44 mm1.55 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 780669607
Side View
Table 58.0%Crown 34°Girdle: MediumPavilion 41.7°Culet: NoneDepth 62.2%

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: Oct 31
Current: HK$40,805 HKD|Low: HK$15,269 HKD|High: HK$44,313 HKD|Avg: HK$26,481 HKD|-7.9%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 1, 2026
Retailer 6HK$15,397 HKD
Retailer 4HK$19,520 HKD
Retailer 2HK$21,111 HKD
Retailer 7HK$21,293 HKD
Retailer 5HK$21,294 HKD
Retailer 3HK$34,197 HKD
NZ JewellersHK$40,805 HKD

44 data points across 7 retailers

7 retailersHK$15,397 HKD to HK$40,805 HKD

A
Cheapest Retailer
-
HK$15,397 HKD
SGD 2,652 SGD
A
Retailer 2
-
HK$19,520 HKD
$2,488 USD
View
A
Retailer 3
-
HK$21,111 HKD
£2,119 GBP
View
A
Retailer 4
-
HK$21,293 HKD
$2,714 USD
View
A
Retailer 5
-
HK$21,294 HKD
$2,714 USD
View
A
Retailer 6
-
HK$34,197 HKD
£3,432 GBP
View
Most Expensive
B+
NZ Jewellers
15e4c9f3-3229-43cc-95e5-9977e36fde67 · Oct 30
HK$40,805 HKD
$5,201 USD
View
6 more retailers have this diamond
Prices start from HK$15,397 HKDSave up to HK$25,408 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
1.55ct Round
HK$15,397 HKD