Marquise|Natural|GIA

1.50ct H SI1 Marquise Natural Diamond

GD • H/SI1 • GIA 1558770144

Certificate GIA 1558770144

Diamond specifications and retailer prices

From $13,470 AUD
$9,440 USD
As of November 2, 2026
10 retailers carry this diamond
Most expensive: $16,439 AUD at Helzberg Diamonds · As of October 20, 2026
View at Helzberg Diamonds

About this 1.5ct natural marquise diamond

This 1.5ct natural marquise sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 1558770144. Listed at 10 retailers as of November 2, 2026. 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

1.50
Carat
H
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.97°
Pavilion angle40.41°
OriginNatural
Grading LabGIA
CertificateGIA 1558770144
Dimensions10.54 × 5.80 × 3.93 mm
L/W Ratio1.82
Culet sizeNone
Top View
10.54 mm5.80 mm1.50 ctH / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1558770144
Side View
Table 60.0%Crown 43.97°Girdle: THK-ETKPavilion 40.41°Culet: NoneDepth 67.8%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 2
Current: $16,439 AUD|Low: $10,547 AUD|High: $18,902 AUD|Avg: $13,209 AUD|-4.0%
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 23, 2026
Retailer 5$10,547 AUD
Retailer 8$10,726 AUD
Retailer 9$11,147 AUD
Retailer 6$11,301 AUD
Retailer 4$11,461 AUD
Retailer 10$11,687 AUD
Retailer 12$13,063 AUD
Retailer 7$13,080 AUD
Retailer 13$13,179 AUD
Retailer 2$13,346 AUD
Retailer 3$13,379 AUD
Helzberg Diamonds$16,439 AUD
Retailer 11$18,154 AUD

31 data points across 13 retailers

10 retailers

Retailer 1
-
$10,547 AUD
SGD 9,989 SGD
Price last confirmed 21 days ago
Retailer 2
-
$10,726 AUD
$7,517 USD
View
Price last confirmed 12 days ago
Retailer 3
-
$11,147 AUD
$7,812 USD
View
Price last confirmed 12 days ago
Retailer 4
-
$11,301 AUD
$7,920 USD
View
Price last confirmed 10 days ago
Retailer 5
-
$11,687 AUD
£6,449 GBP
View
Price last confirmed 12 days ago
Retailer 6
-
$13,080 AUD
$9,167 USD
View
Price last confirmed 12 days ago
Retailer 7
-
$13,179 AUD
$9,236 USD
View
Price last confirmed 13 days ago
Retailer 8
-
$13,379 AUD
$9,376 USD
View
Price last confirmed 13 days ago
B
Retailer 9
-
$13,470 AUD
$9,440 USD
View
Most Expensive
Helzberg Diamonds
XZRHLLONNGHKK · Oct 20
$16,439 AUD
$11,521 USD
View
Price last confirmed 13 days ago
9 more retailers have this diamond
Prices start from $13,470 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
1.50ct Marquise
$13,470 AUD