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Marquise|Natural|GIA

1.51ct H SI1 Marquise Natural Diamond

H/SI1 • GIA 6565358396

Certificate GIA 6565358396

Diamond specifications and retailer prices

From $10,493 AUD
As of November 2, 2026
Save $8,136 AUD (44%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $18,629 AUD at NZ Jewellers · As of November 3, 2026
View at NZ Jewellers

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included) and certified by GIA 6565358396. Listed at 7 retailers as of November 2, 2026, with prices from $10,493 to $18,629, a $8,136 spread on the same certified stone. NZ Jewellers lists it at $18,629. 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

1.51
Carat
H
Colour
SI1
Clarity
-
Cut

Specifications

Cut
PolishExcellent
SymmetryVery Good
FluorescenceStrong
Crown angle40°
Pavilion angle37.72°
OriginNatural
Grading LabGIA
CertificateGIA 6565358396
Dimensions10.92 × 5.97 × 3.71 mm
L/W Ratio1.83
Girdle conditionExtremely Thick
Key to symbols
Crystal, Feather, Cavity, Needle, Natural
Top View
10.92 mm5.97 mm1.51 ctH / SI1
OriginNatural
PolishExcellent
SymmetryVery Good
FluorescenceStrong
CertificateGIA 6565358396
Side View
Table 56.0%Crown 40°GirdlePavilion 37.72°CuletDepth 62.1%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $18,629 AUD|Low: $10,173 AUD|High: $19,751 AUD|Avg: $13,330 AUD|-5.7%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 2, 2026
Retailer 2$10,493 AUD
Retailer 4$10,639 AUD
Retailer 7$11,068 AUD
Retailer 6$11,138 AUD
Retailer 5$11,310 AUD
Retailer 3$15,522 AUD
NZ Jewellers$18,629 AUD

37 data points across 7 retailers

7 retailers$10,493 AUD to $18,629 AUD

B+
Cheapest Retailer
-
$10,493 AUD
B+
Retailer 2
-
$10,639 AUD
View
Retailer 3
-
$11,068 AUD
View
Price last confirmed 15 days ago
B+
Retailer 4
-
$11,138 AUD
View
B+
Retailer 5
-
$11,310 AUD
View
B
Retailer 6
-
$15,522 AUD
View
Most Expensive
C
NZ Jewellers
2ad8eb61-efa7-48b6-8ea3-d62b9172fbfc · Nov 3
$18,629 AUD
$12,800 USD
View
6 more retailers have this diamond
Prices start from $10,493 AUDSave up to $8,136 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+
1.51ct Marquise
$10,493 AUD