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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 $723 AUD
₹48,225 INR
As of November 2, 2026
Save $1,585 AUD (69%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $3,363 AUD 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: $3,363 AUD|Low: $722 AUD|High: $3,363 AUD|Avg: $1,272 AUD
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$723 AUD
Retailer 6$906 AUD
Retailer 5$1,303 AUD
Retailer 4$1,504 AUD
Retailer 9$1,638 AUD
Retailer 14$1,694 AUD
Retailer 11$1,836 AUD
Retailer 13$1,933 AUD
Retailer 12$1,998 AUD
Retailer 8$2,080 AUD
Retailer 3$2,119 AUD
Retailer 7$2,254 AUD
Retailer 10$2,307 AUD
MOH London$3,363 AUD

38 data points across 14 retailers

14 retailers$723 AUD to $2,307 AUD

A
Cheapest Retailer
-
$723 AUD
₹48,225 INR
A
Retailer 2
-
$906 AUD
$635 USD
View
B+
Retailer 3
-
$1,303 AUD
€870 EUR
View
B
Retailer 4
-
$1,504 AUD
ZAR 17,026 ZAR
View
B
Retailer 5
-
$1,638 AUD
$1,148 USD
View
B
Retailer 6
-
$1,694 AUD
$1,187 USD
View
Final sale: no returns
B
Retailer 7
-
$1,836 AUD
$1,287 USD
View
B
Retailer 8
-
$1,933 AUD
$1,355 USD
View
B
Retailer 9
-
$1,998 AUD
$1,400 USD
View
B
Retailer 10
-
$2,080 AUD
£1,148 GBP
View
B
Retailer 11
-
$2,119 AUD
$1,485 USD
View
B
Retailer 12
-
$2,254 AUD
£1,244 GBP
View
B
Retailer 13
-
$2,307 AUD
$1,617 USD
View
Most Expensive
MOH London
D5D7E2BD8 · Nov 2
$3,363 AUD
£1,856 GBP
View
Price under review
13 more retailers have this diamond
Prices start from $723 AUDSave up to $1,585 AUD

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
$723 AUD