Marquise|Natural|IGI

1.01ct I SI1 Marquise Natural Diamond

VG • I/SI1 • IGI 803629020

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 803629020

Diamond specifications and retailer prices

From £1,533 GBP
As of October 31, 2026
Save £1,440 GBP (48%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £3,656 GBP at NZ Jewellers · As of September 29, 2026
View at NZ Jewellers

About this 1.01ct natural marquise diamond

This 1.01ct natural marquise sits in the classic one-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 803629020. Listed at 18 retailers as of October 31, 2026, with a 94% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
I
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.2°
Pavilion angle40.9°
OriginNatural
Grading LabIGI
CertificateIGI 803629020
Dimensions9.75 × 5.17 × 3.34 mm
L/W Ratio1.89
Girdle conditionFaceted
Top View
9.75 mm5.17 mm1.01 ctI / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 803629020
Side View
Table 60.0%Crown 39.2°Girdle: STK-THKPavilion 40.9°Culet: NoneDepth 64.6%

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 31
Current: £1,876 GBP|Low: £1,533 GBP|High: £3,100 GBP|Avg: £2,018 GBP|-1.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 4, 2026
Retailer 11£1,533 GBP
Retailer 3£1,566 GBP
Retailer 6£1,652 GBP
Retailer 10£1,658 GBP
Retailer 5£1,700 GBP
Retailer 4£1,749 GBP
Retailer 12£1,784 GBP
Retailer 9£1,801 GBP
Retailer 1£1,876 GBP
Retailer 2£2,086 GBP
Retailer 7£2,111 GBP
Retailer 8£2,973 GBP

35 data points across 12 retailers

18 retailers£1,533 GBP to £2,973 GBP

A
Cheapest Retailer
-
£1,533 GBP
A
Retailer 2
-
£1,566 GBP
View
Final sale: no returns
A
Retailer 3
-
£1,652 GBP
View
B+
Retailer 4
-
£1,658 GBP
View
B+
Retailer 5
-
£1,700 GBP
View
B+
Retailer 6
-
£1,749 GBP
View
Retailer 7
-
£1,749 GBP
View
Price last confirmed 34 days ago
Retailer 8
-
£1,749 GBP
View
Price last confirmed 19 days ago
B+
Retailer 9
-
£1,784 GBP
View
B+
Retailer 10
-
£1,801 GBP
View
Retailer 11
-
£1,829 GBP
View
Price last confirmed 34 days ago
B+
Retailer 12
-
£1,876 GBP
View
Retailer 13
-
£2,018 GBP
View
Price last confirmed 50 days ago
Retailer 14
-
£2,018 GBP
View
Price last confirmed 36 days ago
B+
Retailer 15
-
£2,086 GBP
View
B+
Retailer 16
-
£2,111 GBP
View
B
Retailer 17
-
£2,973 GBP
View
Most Expensive
NZ Jewellers
f17c358e-89c4-4a37-a46d-cfeeec25a26e · Sep 29
£3,656 GBP
$4,903 USD
View
Price last confirmed 35 days ago
17 more retailers have this diamond
Prices start from £1,533 GBPSave up to £1,440 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
£1,533 GBP