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Marquise|Natural|GIA

1.01ct H SI1 Marquise Natural Diamond

VG • H/SI1 • GIA 5242098943

Certificate GIA 5242098943

Diamond specifications and retailer prices

From £1,826 GBP
As of November 5, 2026
Save £1,565 GBP (46%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £3,390 GBP at Helzberg Diamonds · As of November 4, 2026
View at Helzberg Diamonds

About this 1.01ct natural marquise diamond

This 1.01ct natural marquise sits in the classic one-carat band, graded H 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 5242098943. Listed at 15 retailers as of November 4, 2026, with prices from £1,826 to £3,390, a £1,565 spread on the same certified stone. Helzberg Diamonds lists it at £3,390. 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

1.01
Carat
H
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.28°
Pavilion angle40.33°
OriginNatural
Grading LabGIA
CertificateGIA 5242098943
Dimensions9.53 × 5.13 × 3.31 mm
L/W Ratio1.86
Culet sizeNone
Top View
9.53 mm5.13 mm1.01 ctH / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5242098943
Side View
Table 61.0%Crown 40.28°Girdle: STK-VTKPavilion 40.33°Culet: NDepth 64.5%

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: £3,390 GBP|Low: £1,823 GBP|High: £3,390 GBP|Avg: £2,369 GBP
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
Retailer 14
Retailer 15
November 5, 2026
Retailer 2£1,826 GBP
Retailer 6£1,938 GBP
Retailer 13£1,958 GBP
Retailer 14£1,972 GBP
Retailer 12£1,976 GBP
Retailer 7£2,007 GBP
Retailer 9£2,108 GBP
Retailer 5£2,146 GBP
Retailer 3£2,309 GBP
Retailer 10£2,376 GBP
Retailer 4£2,391 GBP
Retailer 8£2,473 GBP
Retailer 15£3,006 GBP
Retailer 11£3,209 GBP
Helzberg Diamonds£3,390 GBP

20 data points across 15 retailers

15 retailers£1,826 GBP to £3,390 GBP

A
Cheapest Retailer
-
£1,826 GBP
B+
Retailer 2
-
£1,938 GBP
View
B+
Retailer 3
-
£1,958 GBP
View
B+
Retailer 4
-
£1,972 GBP
View
Retailer 5
-
£1,976 GBP
View
Price last confirmed 8 days ago
B+
Retailer 6
-
£2,007 GBP
View
B+
Retailer 7
-
£2,108 GBP
View
B+
Retailer 8
-
£2,146 GBP
View
B+
Retailer 9
-
£2,309 GBP
View
B+
Retailer 10
-
£2,376 GBP
View
B
Retailer 11
-
£2,391 GBP
View
B+
Retailer 12
-
£2,473 GBP
View
B
Retailer 13
-
£3,006 GBP
View
B
Retailer 14
-
£3,209 GBP
View
Most Expensive
B
Helzberg Diamonds
XZRLIKIGPOPKJ · Nov 4
£3,390 GBP
$4,563 USD
View
14 more retailers have this diamond
Prices start from £1,826 GBPSave up to £1,565 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
1.01ct Marquise
£1,826 GBP