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Marquise|Natural|GIA

0.51ct K SI1 Marquise Natural Diamond

EX • K/SI1 • GIA 7566603273

Certificate GIA 7566603273

Diamond specifications and retailer prices

From $589 AUD
As of November 6, 2026
Save $617 AUD (51%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $1,206 AUD at Frank Darling · As of November 6, 2026
View at Frank Darling

About this 0.51ct natural marquise diamond

This 0.51ct natural marquise sits in the half to three-quarter 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 7566603273. Listed at 11 retailers as of November 6, 2026, with prices from $589 to $1,206, a $617 spread on the same certified stone. Frank Darling lists it at $1,206. 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
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle36.24°
Pavilion angle41.54°
OriginNatural
Grading LabGIA
CertificateGIA 7566603273
Dimensions8.13 × 4.12 × 2.65 mm
L/W Ratio1.97
Culet sizeNone
Top View
8.13 mm4.12 mm0.51 ctK / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 7566603273
Side View
Table 58.0%Crown 36.24°Girdle: THN-VTKPavilion 41.54°Culet: NoneDepth 64.4%

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 6
Current: $1,206 AUD|Low: $589 AUD|High: $1,206 AUD|Avg: $786 AUD
Frank Darling
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 8$589 AUD
Retailer 10$614 AUD
Retailer 6$640 AUD
Retailer 11$666 AUD
Retailer 5$706 AUD
Retailer 3$764 AUD
Retailer 9$823 AUD
Retailer 2$863 AUD
Retailer 7$881 AUD
Retailer 4$1,010 AUD
Frank Darling$1,206 AUD

23 data points across 11 retailers

11 retailers$589 AUD to $1,206 AUD

A
Cheapest Retailer
-
$589 AUD
A
Retailer 2
-
$614 AUD
View
A
Retailer 3
-
$640 AUD
View
A
Retailer 4
-
$666 AUD
View
A
Retailer 5
-
$706 AUD
View
B+
Retailer 6
-
$764 AUD
View
B+
Retailer 7
-
$823 AUD
View
B+
Retailer 8
-
$863 AUD
View
B+
Retailer 9
-
$881 AUD
View
B+
Retailer 10
-
$1,010 AUD
View
Most Expensive
B
Frank Darling
2702647HK · Nov 6
$1,206 AUD
$844 USD
View
10 more retailers have this diamond
Prices start from $589 AUDSave up to $617 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
$589 AUD