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Round|Natural|GIA

1.51ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 2566054289

Certificate GIA 2566054289

Diamond specifications and retailer prices

From HK$43,169 HKD
$5,502 USD
As of November 1, 2026
Save HK$35,172 HKD (45%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: HK$90,842 HKD at NZ Jewellers · As of September 28, 2026
View at NZ Jewellers

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2566054289. Listed at 19 retailers as of November 1, 2026, with a 81% 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

1.51
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 2566054289
Dimensions7.28 × 7.32 × 4.59 mm
L/W Ratio1.01
Star length50%
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Knot, Feather, Needle
Top View
7.28 mm7.32 mm1.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2566054289
Side View
Table 56.0%Crown 36°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.8%

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 1
Current: HK$57,815 HKD|Low: HK$43,169 HKD|High: HK$80,992 HKD|Avg: HK$55,505 HKD|-1.3%
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
November 2, 2026
Retailer 2HK$43,169 HKD
Retailer 5HK$44,409 HKD
Retailer 13HK$44,459 HKD
Retailer 3HK$45,013 HKD
Retailer 6HK$46,998 HKD
Retailer 15HK$47,312 HKD
Retailer 4HK$50,146 HKD
Retailer 7HK$51,863 HKD
Retailer 12HK$51,863 HKD
Retailer 8HK$53,549 HKD
Retailer 14HK$54,561 HKD
Retailer 1HK$57,815 HKD
Retailer 9HK$59,770 HKD
Retailer 11HK$69,068 HKD
Retailer 10HK$78,341 HKD

39 data points across 15 retailers

19 retailersHK$43,169 HKD to HK$78,341 HKD

A
Cheapest Retailer
-
HK$43,169 HKD
$5,502 USD
B+
Retailer 2
-
HK$44,409 HKD
$5,660 USD
View
B+
Retailer 3
-
HK$44,459 HKD
$5,666 USD
View
B+
Retailer 4
-
HK$45,013 HKD
$5,737 USD
View
B+
Retailer 5
-
HK$46,998 HKD
$5,990 USD
View
Final sale: no returns
B+
Retailer 6
-
HK$47,312 HKD
$6,030 USD
View
B+
Retailer 7
-
HK$50,146 HKD
$6,391 USD
View
B+
Retailer 8
-
HK$51,863 HKD
$6,610 USD
View
Retailer 9
-
HK$51,863 HKD
$6,610 USD
View
Price last confirmed 19 days ago
B+
Retailer 10
-
HK$53,549 HKD
£5,374 GBP
View
Retailer 11
-
HK$54,319 HKD
$6,923 USD
View
Price last confirmed 26 days ago
Retailer 12
-
HK$54,561 HKD
A$10,698 AUD
View
Price last confirmed 12 days ago
Retailer 13
-
HK$55,150 HKD
$7,029 USD
View
Price last confirmed 34 days ago
B+
Retailer 14
-
HK$57,815 HKD
£5,802 GBP
View
B+
Retailer 15
-
HK$59,770 HKD
€7,255 EUR
View
Retailer 16
-
HK$62,675 HKD
$7,988 USD
View
Price last confirmed 34 days ago
B
Retailer 17
-
HK$69,068 HKD
ZAR 142,210 ZAR
View
B
Retailer 18
-
HK$78,341 HKD
£7,862 GBP
View
Most Expensive
NZ Jewellers
2cc99845-ad31-4206-9a33-efb150097eb4 · Sep 28
HK$90,842 HKD
$11,578 USD
View
Price last confirmed 36 days ago
18 more retailers have this diamond
Prices start from HK$43,169 HKDSave up to HK$35,172 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
1.51ct Round
HK$43,169 HKD