CaratHunter
Plans
Marquise|Natural|GIA

1.51ct F SI2 Marquise Natural Diamond

GD • F/SI2 • GIA 1558632218

Certificate GIA 1558632218

Diamond specifications and retailer prices

From $8,855 AUD
As of November 5, 2026
Save $5,682 AUD (39%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $14,537 AUD at Helzberg Diamonds · As of November 6, 2026
View at Helzberg Diamonds

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise sits in the one-and-a-half to two carat band, graded F colour (colourless) and SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 1558632218. Listed at 12 retailers as of November 5, 2026, with prices from $8,855 to $14,537, a $5,682 spread on the same certified stone. Helzberg Diamonds lists it at $14,537. 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
F
Colour
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.67°
Pavilion angle39.9°
OriginNatural
Grading LabGIA
CertificateGIA 1558632218
Dimensions10.67 × 5.86 × 3.91 mm
L/W Ratio1.82
Culet sizeNone
Top View
10.67 mm5.86 mm1.51 ctF / SI2
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1558632218
Side View
Table 60.0%Crown 42.67°Girdle: STK-VTKPavilion 39.9°Culet: NoneDepth 66.7%

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 5
Current: $14,537 AUD|Low: $8,855 AUD|High: $15,183 AUD|Avg: $10,807 AUD|-4.3%
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 7, 2026
Retailer 6$8,855 AUD
Retailer 5$9,268 AUD
Retailer 9$9,370 AUD
Retailer 11$9,585 AUD
Retailer 2$9,757 AUD
Retailer 7$10,143 AUD
Retailer 3$11,095 AUD
Retailer 10$11,167 AUD
Retailer 4$11,230 AUD
Retailer 8$11,307 AUD
Helzberg Diamonds$14,537 AUD

42 data points across 11 retailers

12 retailers$8,855 AUD to $14,537 AUD

A
Cheapest Retailer
-
$8,855 AUD
A
Retailer 2
-
$9,268 AUD
View
A
Retailer 3
-
$9,370 AUD
View
A
Retailer 4
-
$9,585 AUD
View
A
Retailer 5
-
$9,757 AUD
View
A
Retailer 6
-
$10,143 AUD
View
B+
Retailer 7
-
$11,095 AUD
View
B+
Retailer 8
-
$11,167 AUD
View
B+
Retailer 9
-
$11,230 AUD
View
B+
Retailer 10
-
$11,307 AUD
View
B+
Retailer 11
-
$11,470 AUD
View
Most Expensive
B
Helzberg Diamonds
XZRHLLOMJIIHO · Nov 6
$14,537 AUD
$9,988 USD
View
11 more retailers have this diamond
Prices start from $8,855 AUDSave up to $5,682 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
1.51ct Marquise
$8,855 AUD