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Marquise|Natural|GIA

1.51ct I SI1 Marquise Natural Diamond

VG • I/SI1 • GIA 6552832032

Certificate GIA 6552832032

Diamond specifications and retailer prices

From $10,830 AUD
$7,590 USD
As of November 1, 2026
Save $7,986 AUD (42%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $20,079 AUD at NZ Jewellers · As of October 17, 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 I 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 6552832032. Listed at 16 retailers as of November 1, 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

1.51
Carat
I
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle40.79°
Pavilion angle37.53°
OriginNatural
Grading LabGIA
CertificateGIA 6552832032
Dimensions10.97 × 5.92 × 3.63 mm
L/W Ratio1.85
Culet sizeNone
Top View
10.97 mm5.92 mm1.51 ctI / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6552832032
Side View
Table 60.0%Crown 40.79°Girdle: STK-VTKPavilion 37.53°Culet: NoneDepth 61.4%

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 1
Current: $20,079 AUD|Low: $10,375 AUD|High: $20,079 AUD|Avg: $13,785 AUD
NZ Jewellers
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
Retailer 15
Retailer 16
Retailer 17
November 2, 2026
Retailer 8$10,375 AUD
Retailer 6$10,830 AUD
Retailer 9$10,929 AUD
Retailer 7$11,785 AUD
Retailer 12$11,870 AUD
Retailer 15$12,548 AUD
Retailer 10$13,186 AUD
Retailer 13$13,514 AUD
Retailer 17$13,561 AUD
Retailer 14$13,996 AUD
Retailer 4$14,383 AUD
Retailer 16$14,383 AUD
Retailer 3$14,759 AUD
Retailer 5$14,854 AUD
Retailer 2$15,116 AUD
Retailer 11$18,816 AUD
NZ Jewellers$20,079 AUD

23 data points across 17 retailers

16 retailers$10,830 AUD to $18,816 AUD

B+
Cheapest Retailer
-
$10,830 AUD
$7,590 USD
B+
Retailer 2
-
$11,785 AUD
$8,259 USD
View
B+
Retailer 3
-
$11,870 AUD
CA$11,554 CAD
View
B
Retailer 4
-
$12,548 AUD
$8,794 USD
View
B
Retailer 5
-
$13,186 AUD
£7,276 GBP
View
B
Retailer 6
-
$13,514 AUD
$9,471 USD
View
B
Retailer 7
-
$13,561 AUD
$9,504 USD
View
B
Retailer 8
-
$13,996 AUD
$9,809 USD
View
B
Retailer 9
-
$14,383 AUD
$10,080 USD
View
B
Retailer 10
-
$14,383 AUD
$10,080 USD
View
Retailer 11
-
$14,759 AUD
$10,343 USD
View
Price last confirmed 14 days ago
B
Retailer 12
-
$14,854 AUD
$10,410 USD
View
B
Retailer 13
-
$15,116 AUD
€10,089 EUR
View
B
Retailer 14
-
$18,816 AUD
£10,383 GBP
View
Retailer 15
-
$20,079 AUD
$14,072 USD
View
Price last confirmed 30 days ago
Most Expensive
NZ Jewellers
593bb57d-3455-48da-a112-0e600b6ca513 · Oct 17
$20,079 AUD
$14,072 USD
View
Price last confirmed 16 days ago
15 more retailers have this diamond
Prices start from $10,830 AUDSave up to $7,986 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
$10,830 AUD