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Marquise|Natural|GIA

1.51ct K SI1 Marquise Natural Diamond

EX • K/SI1 • GIA 1558665399

Certificate GIA 1558665399

Diamond specifications and retailer prices

From HK$40,167 HKD
As of November 5, 2026
Save HK$26,671 HKD (40%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: HK$70,372 HKD at NZ Jewellers · As of September 29, 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1558665399. Listed at 14 retailers as of November 4, 2026, with a 66% 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
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1558665399
Dimensions10.82 × 6.00 × 3.89 mm
L/W Ratio1.80
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Needle
Top View
10.82 mm6.00 mm1.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1558665399
Side View
Table 63.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 64.8%

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 5
Current: HK$40,817 HKD|Low: HK$40,167 HKD|High: HK$67,817 HKD|Avg: HK$47,518 HKD|-1.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 7HK$40,167 HKD
Retailer 2HK$40,653 HKD
Retailer 1HK$40,817 HKD
Retailer 6HK$42,079 HKD
Retailer 5HK$47,424 HKD
Retailer 3HK$51,335 HKD
Retailer 4HK$66,837 HKD

38 data points across 7 retailers

14 retailersHK$40,167 HKD to HK$66,837 HKD

A
Cheapest Retailer
-
HK$40,167 HKD
A
Retailer 2
-
HK$40,653 HKD
View
A
Retailer 3
-
HK$40,817 HKD
View
Retailer 4
-
HK$42,079 HKD
View
Price last confirmed 30 days ago
Retailer 5
-
HK$42,079 HKD
View
Price last confirmed 30 days ago
Retailer 6
-
HK$42,079 HKD
View
Price last confirmed 57 days ago
Retailer 7
-
HK$42,079 HKD
View
Price last confirmed 37 days ago
Retailer 8
-
HK$42,079 HKD
View
Price last confirmed 13 days ago
B+
Retailer 9
-
HK$47,424 HKD
View
Retailer 10
-
HK$48,553 HKD
View
Price last confirmed 39 days ago
Retailer 11
-
HK$48,553 HKD
View
Price last confirmed 57 days ago
B+
Retailer 12
-
HK$51,335 HKD
View
B
Retailer 13
-
HK$66,837 HKD
View
Most Expensive
NZ Jewellers
6b44963f-9bc3-4377-899b-8639dd877a1b · Sep 29
HK$70,372 HKD
$8,979 USD
View
Price last confirmed 38 days ago
13 more retailers have this diamond
Prices start from HK$40,167 HKDSave up to HK$26,671 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 Marquise
HK$40,167 HKD