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Marquise|Natural|GIA

0.51ct H SI1 Marquise Natural Diamond

VG • H/SI1 • GIA 7553135928

Certificate GIA 7553135928

Diamond specifications and retailer prices

From $1,394 AUD
$977 USD
As of November 1, 2026
Save $1,033 AUD (43%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $2,880 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 very-good cut grade stated by the retailer rather than the lab and certified by GIA 7553135928. Listed at 13 retailers as of October 31, 2026, with a 74% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
H
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle38.78°
Pavilion angle42.14°
OriginNatural
Grading LabGIA
CertificateGIA 7553135928
Dimensions8.31 × 4.00 × 2.66 mm
L/W Ratio2.08
Girdle conditionVery Thick
Key to symbols
Feather
Top View
8.31 mm4.00 mm0.51 ctH / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 7553135928
Side View
Table 60.0%Crown 38.78°GirdlePavilion 42.14°Culet: NoneDepth 66.4%

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 1
Current: $2,880 AUD|Low: $1,424 AUD|High: $3,836 AUD|Avg: $2,116 AUD|-0.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 8$1,424 AUD
Retailer 10$1,424 AUD
Retailer 6$1,480 AUD
Retailer 9$1,644 AUD
Retailer 2$1,777 AUD
Retailer 5$2,056 AUD
Retailer 3$2,204 AUD
Retailer 4$2,427 AUD
MOH London$2,880 AUD
Retailer 7$3,836 AUD

44 data points across 10 retailers

13 retailers$1,394 AUD to $2,427 AUD

B
Cheapest Retailer
-
$1,394 AUD
$977 USD
B
Retailer 2
-
$1,410 AUD
$988 USD
View
B
Retailer 3
-
$1,424 AUD
$998 USD
View
B
Retailer 4
-
$1,424 AUD
$998 USD
View
B
Retailer 5
-
$1,480 AUD
$1,037 USD
View
B
Retailer 6
-
$1,563 AUD
$1,095 USD
View
B
Retailer 7
-
$1,644 AUD
$1,152 USD
View
B
Retailer 8
-
$1,777 AUD
£981 GBP
View
Retailer 9
-
$2,056 AUD
View
Price last confirmed 28 days ago
B
Retailer 10
-
$2,204 AUD
€1,471 EUR
View
B
Retailer 11
-
$2,427 AUD
ZAR 27,482 ZAR
View
Most Expensive
MOH London
CF7004367 · Nov 2
$2,880 AUD
£1,589 GBP
View
Price under review
11 more retailers have this diamond
Prices start from $1,394 AUDSave up to $1,033 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
$1,394 AUD