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Marquise|Natural|IGI

1.00ct K SI1 Marquise Natural Diamond

VG • K/SI1 • IGI 788607681

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 788607681

Diamond specifications and retailer prices

From £894 GBP
As of November 6, 2026
Save £894 GBP (50%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £2,460 GBP at NZ Jewellers · As of September 30, 2026
View at NZ Jewellers

About this 1ct natural marquise diamond

This 1ct natural marquise sits in the classic one-carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 788607681. Listed at 15 retailers as of November 4, 2026, with a 100% 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

1.00
Carat
K
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle40.7°
Pavilion angle41°
OriginNatural
Grading LabIGI
CertificateIGI 788607681
Dimensions9.81 × 5.17 × 3.34 mm
L/W Ratio1.90
Girdle conditionFaceted
Culet sizePointed
Top View
9.81 mm5.17 mm1.00 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 788607681
Side View
Table 62.0%Crown 40.7°Girdle: STK-THKPavilion 41°Culet: NoneDepth 64.6%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £894 GBP|Low: £894 GBP|High: £1,870 GBP|Avg: £1,210 GBP|-1.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 1£894 GBP
Retailer 2£1,009 GBP
Retailer 10£1,020 GBP
Retailer 9£1,035 GBP
Retailer 8£1,065 GBP
Retailer 3£1,065 GBP
Retailer 5£1,102 GBP
Retailer 6£1,195 GBP
Retailer 4£1,340 GBP
Retailer 7£1,788 GBP

44 data points across 10 retailers

15 retailers£894 GBP to £1,788 GBP

A
Cheapest Retailer
-
£894 GBP
Retailer 2
-
£1,009 GBP
View
Price last confirmed 36 days ago
Retailer 3
-
£1,009 GBP
View
Price last confirmed 21 days ago
B+
Retailer 4
-
£1,020 GBP
View
B+
Retailer 5
-
£1,035 GBP
View
Retailer 6
-
£1,055 GBP
View
Price last confirmed 36 days ago
B+
Retailer 7
-
£1,065 GBP
View
B+
Retailer 8
-
£1,065 GBP
View
B+
Retailer 9
-
£1,102 GBP
View
Retailer 10
-
£1,164 GBP
View
Price last confirmed 61 days ago
Retailer 11
-
£1,164 GBP
View
Price last confirmed 38 days ago
B+
Retailer 12
-
£1,195 GBP
View
B+
Retailer 13
-
£1,340 GBP
View
B
Retailer 14
-
£1,788 GBP
View
Most Expensive
NZ Jewellers
c87500d9-3436-4a17-a546-ca8cbea6dba6 · Sep 30
£2,460 GBP
$3,293 USD
View
Price last confirmed 37 days ago
14 more retailers have this diamond
Prices start from £894 GBPSave up to £894 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
1.00ct Marquise
£894 GBP