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Marquise|Natural|GIA

1.00ct K SI1 Marquise Natural Diamond

VG • K/SI1 • GIA 1559993905

Certificate GIA 1559993905

Diamond specifications and retailer prices

From £965 GBP
As of November 6, 2026
Save £2,197 GBP (69%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £3,161 GBP at NZ Jewellers · As of November 5, 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 stated by the retailer rather than the lab and certified by GIA 1559993905. Listed at 15 retailers as of November 5, 2026, with prices from £965 to £3,161, a £2,197 spread on the same certified stone. NZ Jewellers lists it at £3,161. 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 (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1559993905
Dimensions9.64 × 5.09 × 3.33 mm
L/W Ratio1.89
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Cloud, Feather, Needle, Indented Natural, Natural
Top View
9.64 mm5.09 mm1.00 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1559993905
Side View
Table 61.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 65.5%

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 6
Current: £1,189 GBP|Low: £965 GBP|High: £2,297 GBP|Avg: £1,511 GBP|-8.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 2£965 GBP
Retailer 1£1,189 GBP
Retailer 4£1,438 GBP
Retailer 5£1,582 GBP
Retailer 3£1,642 GBP
Retailer 6£2,270 GBP

35 data points across 6 retailers

15 retailers£965 GBP to £3,161 GBP

A
Cheapest Retailer
-
£965 GBP
B+
Retailer 2
-
£1,181 GBP
View
A
Retailer 3
-
£1,189 GBP
View
B+
Retailer 4
-
£1,296 GBP
View
Retailer 5
-
£1,296 GBP
View
Price last confirmed 8 days ago
B+
Retailer 6
-
£1,345 GBP
View
B+
Retailer 7
-
£1,356 GBP
View
B+
Retailer 8
-
£1,398 GBP
View
Retailer 9
-
£1,405 GBP
View
Price last confirmed 38 days ago
B+
Retailer 10
-
£1,438 GBP
View
B+
Retailer 11
-
£1,495 GBP
View
B+
Retailer 12
-
£1,582 GBP
View
B+
Retailer 13
-
£1,642 GBP
View
B
Retailer 14
-
£2,270 GBP
View
Most Expensive
C
NZ Jewellers
73aed409-1bee-4c0d-bbc6-5dcd82ceaa92 · Nov 5
£3,161 GBP
$4,231 USD
View
14 more retailers have this diamond
Prices start from £965 GBPSave up to £2,197 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
£965 GBP