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Marquise|Natural|GIA

0.51ct H SI1 Marquise Natural Diamond

EX • H/SI1 • GIA 6565280558

Certificate GIA 6565280558

Diamond specifications and retailer prices

From $648 SGD
₹48,225 INR
As of November 2, 2026
Save $1,420 SGD (69%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $3,015 SGD at MOH London · As of November 2, 2026
View at MOH London

About this 0.51ct natural marquise diamond

This 0.51ct natural marquise sits in the half to three-quarter 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 6565280558. Listed at 14 retailers as of November 1, 2026, with a 219% 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
H
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6565280558
Dimensions8.57 × 3.89 × 2.49 mm
L/W Ratio2.20
Culet sizeNone
Top View
8.57 mm3.89 mm0.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6565280558
Side View
Table 59.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 64.1%

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 2
Current: $3,015 SGD|Low: $647 SGD|High: $3,015 SGD|Avg: $1,140 SGD
MOH London
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
November 2, 2026
Retailer 2$648 SGD
Retailer 6$812 SGD
Retailer 5$1,168 SGD
Retailer 4$1,348 SGD
Retailer 9$1,468 SGD
Retailer 14$1,518 SGD
Retailer 11$1,646 SGD
Retailer 13$1,733 SGD
Retailer 12$1,790 SGD
Retailer 8$1,864 SGD
Retailer 3$1,899 SGD
Retailer 7$2,020 SGD
Retailer 10$2,068 SGD
MOH London$3,015 SGD

38 data points across 14 retailers

14 retailers$648 SGD to $2,068 SGD

A
Cheapest Retailer
-
$648 SGD
₹48,225 INR
A
Retailer 2
-
$812 SGD
$635 USD
View
B+
Retailer 3
-
$1,168 SGD
€870 EUR
View
B
Retailer 4
-
$1,348 SGD
ZAR 17,026 ZAR
View
B
Retailer 5
-
$1,468 SGD
$1,148 USD
View
B
Retailer 6
-
$1,518 SGD
$1,187 USD
View
Final sale: no returns
B
Retailer 7
-
$1,646 SGD
$1,287 USD
View
B
Retailer 8
-
$1,733 SGD
$1,355 USD
View
B
Retailer 9
-
$1,790 SGD
$1,400 USD
View
B
Retailer 10
-
$1,864 SGD
£1,148 GBP
View
B
Retailer 11
-
$1,899 SGD
$1,485 USD
View
B
Retailer 12
-
$2,020 SGD
£1,244 GBP
View
B
Retailer 13
-
$2,068 SGD
$1,617 USD
View
Most Expensive
MOH London
D5D7E2BD8 · Nov 2
$3,015 SGD
£1,856 GBP
View
Price under review
13 more retailers have this diamond
Prices start from $648 SGDSave up to $1,420 SGD

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
$648 SGD