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Marquise|Natural|GIA

1.50ct I SI1 Marquise Natural Diamond

EX • I/SI1 • GIA 1553693221

Certificate GIA 1553693221

Diamond specifications and retailer prices

From £4,832 GBP
$6,484 USD
As of October 28, 2026
Save £1,823 GBP (27%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £6,655 GBP at Jared · As of October 28, 2026
View at Jared

About this 1.5ct natural marquise diamond

This 1.5ct 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 top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1553693221. Listed at 11 retailers as of October 28, 2026, with prices from £4,832 to £6,655, a £1,823 spread on the same certified stone. Jared lists it at £6,655. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.50
Carat
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle38.42°
Pavilion angle38.6°
OriginNatural
Grading LabGIA
CertificateGIA 1553693221
Dimensions11.45 × 5.98 × 3.69 mm
L/W Ratio1.91
Culet sizeNone
Top View
11.45 mm5.98 mm1.50 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 1553693221
Side View
Table 57.0%Crown 38.42°Girdle: THN-THKPavilion 38.6°Culet: NoneDepth 61.7%

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: Oct 28
Current: £6,655 GBP|Low: £4,298 GBP|High: £8,279 GBP|Avg: £5,820 GBP
Jared
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
October 29, 2026
Retailer 3£4,341 GBP
Retailer 7£4,832 GBP
Retailer 10£4,862 GBP
Retailer 13£5,141 GBP
Retailer 5£5,153 GBP
Retailer 14£5,417 GBP
Retailer 11£5,846 GBP
Retailer 4£6,073 GBP
Retailer 8£6,438 GBP
Retailer 9£6,438 GBP
Retailer 12£6,523 GBP
Retailer 2£6,625 GBP
Jared£6,655 GBP
Retailer 6£8,279 GBP

27 data points across 14 retailers

11 retailers£4,832 GBP to £6,655 GBP

A
Cheapest Retailer
-
£4,832 GBP
$6,484 USD
A
Retailer 2
-
£4,862 GBP
$6,525 USD
View
B+
Retailer 3
-
£5,141 GBP
SGD 9,322 SGD
View
Retailer 4
-
£5,153 GBP
$6,915 USD
View
Price last confirmed 28 days ago
B+
Retailer 5
-
£5,846 GBP
$7,844 USD
View
B+
Retailer 6
-
£5,900 GBP
$7,917 USD
View
B
Retailer 7
-
£6,438 GBP
$8,640 USD
View
B
Retailer 8
-
£6,438 GBP
$8,640 USD
View
Retailer 9
-
£6,523 GBP
$8,753 USD
View
Price last confirmed 21 days ago
B
Retailer 10
-
£6,625 GBP
$8,890 USD
View
Most Expensive
B
Jared
160131634 · Oct 28
£6,655 GBP
$8,930 USD
View
10 more retailers have this diamond
Prices start from £4,832 GBPSave up to £1,823 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.

A
1.50ct Marquise
£4,832 GBP