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Marquise|Natural|GIA

0.51ct E SI1 Marquise Natural Diamond

EX • E/SI1 • GIA 6541370134

Certificate GIA 6541370134

Diamond specifications and retailer prices

From HK$6,724 HKD
$857 USD
As of October 31, 2026
Save HK$8,083 HKD (55%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: HK$19,614 HKD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 0.51ct natural marquise diamond

This 0.51ct natural marquise sits in the half to three-quarter carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6541370134. Listed at 23 retailers as of October 29, 2026, with a 120% 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

0.51
Carat
E
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6541370134
Dimensions8.12 × 4.15 × 2.57 mm
L/W Ratio1.96
Top View
8.12 mm4.15 mm0.51 ctE / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 6541370134
Side View
Table 63.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 61.8%

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: Oct 31
Current: HK$19,614 HKD|Low: HK$5,602 HKD|High: HK$19,614 HKD|Avg: HK$10,433 HKD
NZ Jewellers
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
October 31, 2026
Retailer 13HK$6,724 HKD
Retailer 11HK$6,747 HKD
Retailer 4HK$7,289 HKD
Retailer 15HK$7,563 HKD
Retailer 3HK$8,207 HKD
Retailer 5HK$8,403 HKD
Retailer 12HK$8,513 HKD
Retailer 7HK$9,046 HKD
Retailer 2HK$9,430 HKD
Retailer 14HK$10,515 HKD
Retailer 8HK$11,294 HKD
Retailer 9HK$12,413 HKD
Retailer 6HK$13,025 HKD
Retailer 10HK$14,807 HKD
NZ JewellersHK$19,614 HKD

45 data points across 15 retailers

23 retailersHK$6,724 HKD to HK$14,807 HKD

A
Cheapest Retailer
-
HK$6,724 HKD
$857 USD
Final sale: no returns
Retailer 2
-
HK$6,747 HKD
$860 USD
View
Price last confirmed 13 days ago
B+
Retailer 3
-
HK$7,202 HKD
$918 USD
View
B+
Retailer 4
-
HK$7,261 HKD
A$1,424 AUD
View
B+
Retailer 5
-
HK$7,289 HKD
$929 USD
View
B+
Retailer 6
-
HK$7,289 HKD
$929 USD
View
B+
Retailer 7
-
HK$7,359 HKD
$938 USD
View
B+
Retailer 8
-
HK$7,563 HKD
$964 USD
View
B+
Retailer 9
-
HK$8,207 HKD
$1,046 USD
View
B
Retailer 10
-
HK$8,403 HKD
$1,071 USD
View
B
Retailer 11
-
HK$8,513 HKD
$1,085 USD
View
B+
Retailer 12
-
HK$8,866 HKD
$1,130 USD
View
B+
Retailer 13
-
HK$8,866 HKD
$1,130 USD
View
B+
Retailer 14
-
HK$9,046 HKD
$1,153 USD
View
B+
Retailer 15
-
HK$9,179 HKD
$1,170 USD
View
B+
Retailer 16
-
HK$9,430 HKD
£946 GBP
View
Retailer 17
-
HK$10,515 HKD
A$2,062 AUD
View
Price last confirmed 27 days ago
B
Retailer 18
-
HK$10,584 HKD
$1,349 USD
View
B
Retailer 19
-
HK$11,294 HKD
€1,371 EUR
View
B
Retailer 20
-
HK$12,413 HKD
ZAR 25,560 ZAR
View
B
Retailer 21
-
HK$13,025 HKD
CA$2,306 CAD
View
B
Retailer 22
-
HK$14,807 HKD
£1,486 GBP
View
Most Expensive
NZ Jewellers
6fe8d8e1-b6e0-4a79-8df8-877dfdece077 · Oct 30
HK$19,614 HKD
$2,500 USD
View
Price under review
22 more retailers have this diamond
Prices start from HK$6,724 HKDSave up to HK$8,083 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
0.51ct Marquise
HK$6,724 HKD