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Marquise|Natural|GIA

1.50ct H SI1 Marquise Natural Diamond

GD • H/SI1 • GIA 1558770144

Certificate GIA 1558770144

Diamond specifications and retailer prices

From £7,035 GBP
$9,440 USD
As of November 2, 2026
10 retailers carry this diamond
Most expensive: £8,585 GBP 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: £8,585 GBP|Low: £5,508 GBP|High: £9,872 GBP|Avg: £6,899 GBP|-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£5,508 GBP
Retailer 8£5,602 GBP
Retailer 9£5,822 GBP
Retailer 6£5,902 GBP
Retailer 4£5,985 GBP
Retailer 10£6,104 GBP
Retailer 12£6,822 GBP
Retailer 7£6,831 GBP
Retailer 13£6,883 GBP
Retailer 2£6,970 GBP
Retailer 3£6,987 GBP
Helzberg Diamonds£8,585 GBP
Retailer 11£9,481 GBP

30 data points across 13 retailers

10 retailers

Retailer 1
-
£5,508 GBP
SGD 9,989 SGD
Price last confirmed 22 days ago
Retailer 2
-
£5,602 GBP
$7,517 USD
View
Price last confirmed 12 days ago
Retailer 3
-
£5,822 GBP
$7,812 USD
View
Price last confirmed 12 days ago
Retailer 4
-
£5,902 GBP
$7,920 USD
View
Price last confirmed 11 days ago
Retailer 5
-
£6,104 GBP
View
Price last confirmed 13 days ago
Retailer 6
-
£6,831 GBP
$9,167 USD
View
Price last confirmed 12 days ago
Retailer 7
-
£6,883 GBP
$9,236 USD
View
Price last confirmed 14 days ago
Retailer 8
-
£6,987 GBP
$9,376 USD
View
Price last confirmed 14 days ago
B
Retailer 9
-
£7,035 GBP
$9,440 USD
View
Most Expensive
Helzberg Diamonds
XZRHLLONNGHKK · Oct 20
£8,585 GBP
$11,521 USD
View
Price last confirmed 14 days ago
9 more retailers have this diamond
Prices start from £7,035 GBP

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
£7,035 GBP