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Marquise|Natural|GIA

0.51ct I SI2 Marquise Natural Diamond

VG • I/SI2 • GIA 6392602089

Certificate GIA 6392602089

Diamond specifications and retailer prices

From $1,441 AUD
As of November 5, 2026
Save $1,256 AUD (47%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $2,697 AUD at MOH London · As of November 4, 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 I colour (near-colourless) and SI2 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 6392602089. Listed at 5 retailers as of November 4, 2026, with prices from $1,441 to $2,697, a $1,256 spread on the same certified stone. MOH London lists it at $2,697. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.51
Carat
I
Colour
SI2
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishVery Good
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 6392602089
Dimensions8.85 × 3.99 × 2.27 mm
L/W Ratio2.22
Top View
8.85 mm3.99 mm0.51 ctI / SI2
OriginNatural
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceMedium
CertificateGIA 6392602089
Side View
Table 60.0%CrownGirdle: THN-THKPavilionCulet: NoneDepth 56.8%

Caratlytics Score

How it works →
B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $2,697 AUD|Low: $1,404 AUD|High: $2,734 AUD|Avg: $1,841 AUD|+2.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 4, 2026
Retailer 3$1,426 AUD
Retailer 5$1,441 AUD
Retailer 4$1,474 AUD
Retailer 6$1,573 AUD
Retailer 2$2,061 AUD
Retailer 7$2,164 AUD
MOH London$2,697 AUD

20 data points across 7 retailers

5 retailers$1,441 AUD to $2,697 AUD

Retailer 1
-
$1,426 AUD
Price last confirmed 19 days ago
B
Retailer 2
-
$1,441 AUD
View
Retailer 3
-
$1,474 AUD
View
Price last confirmed 8 days ago
B
Retailer 4
-
$2,061 AUD
View
Most Expensive
C
MOH London
66D9DBCA7 · Nov 4
$2,697 AUD
£1,459 GBP
View
4 more retailers have this diamond
Prices start from $1,441 AUDSave up to $1,256 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.

B
0.51ct Marquise
$1,441 AUD