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Marquise|Natural|GIA

1.51ct H SI1 Marquise Natural Diamond

EX • H/SI1 • GIA 6555830427

Certificate GIA 6555830427

Diamond specifications and retailer prices

From HK$71,830 HKD
As of November 4, 2026
Save HK$64,784 HKD (47%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: HK$136,614 HKD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6555830427. Listed at 22 retailers as of November 4, 2026, with prices from HK$71,830 to HK$136,614, a HK$64,784 spread on the same certified stone. NZ Jewellers lists it at HK$136,614. 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
H
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle39.8°
Pavilion angle39.44°
OriginNatural
Grading LabGIA
CertificateGIA 6555830427
Dimensions11.45 × 5.91 × 3.74 mm
L/W Ratio1.94
Culet sizeNone
Top View
11.45 mm5.91 mm1.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6555830427
Side View
Table 58.0%Crown 39.8°Girdle: STK-THKPavilion 39.44°Culet: NoneDepth 63.3%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: HK$87,693 HKD|Low: HK$71,830 HKD|High: HK$129,552 HKD|Avg: HK$98,748 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
November 7, 2026
Retailer 6HK$71,830 HKD
Retailer 10HK$81,964 HKD
Retailer 1HK$87,693 HKD
Retailer 3HK$88,798 HKD
Retailer 8HK$89,033 HKD
Retailer 2HK$90,161 HKD
Retailer 11HK$91,423 HKD
Retailer 9HK$99,841 HKD
Retailer 7HK$102,850 HKD
Retailer 4HK$119,583 HKD
Retailer 5HK$127,671 HKD

46 data points across 11 retailers

22 retailersHK$71,830 HKD to HK$136,614 HKD

B+
Cheapest Retailer
-
HK$71,830 HKD
B+
Retailer 2
-
HK$76,046 HKD
View
B+
Retailer 3
-
HK$76,948 HKD
View
B
Retailer 4
-
HK$81,000 HKD
View
Retailer 5
-
HK$81,964 HKD
View
Price last confirmed 9 days ago
B
Retailer 6
-
HK$81,964 HKD
View
Final sale: no returns
B
Retailer 7
-
HK$87,693 HKD
View
B
Retailer 8
-
HK$88,798 HKD
View
Retailer 9
-
HK$89,033 HKD
View
Price last confirmed 15 days ago
B
Retailer 10
-
HK$90,161 HKD
View
B
Retailer 11
-
HK$91,423 HKD
View
B
Retailer 12
-
HK$95,851 HKD
View
B
Retailer 13
-
HK$95,851 HKD
View
B
Retailer 14
-
HK$97,654 HKD
View
B
Retailer 15
-
HK$99,065 HKD
View
B
Retailer 16
-
HK$99,841 HKD
View
B
Retailer 17
-
HK$102,458 HKD
View
B
Retailer 18
-
HK$102,850 HKD
View
Retailer 19
-
HK$107,843 HKD
View
Price last confirmed 15 days ago
B
Retailer 20
-
HK$119,583 HKD
View
B
Retailer 21
-
HK$127,671 HKD
View
Most Expensive
B
NZ Jewellers
ae7b53dc-56f9-4716-9037-2b4f7d008ff1 · Nov 5
HK$136,614 HKD
$17,431 USD
View
21 more retailers have this diamond
Prices start from HK$71,830 HKDSave up to HK$64,784 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.

B+
1.51ct Marquise
HK$71,830 HKD