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Marquise|Natural|GIA

1.00ct K SI1 Marquise Natural Diamond

GD • K/SI1 • GIA 2556808009

Certificate GIA 2556808009

Diamond specifications and retailer prices

From £994 GBP
As of November 6, 2026
Save £886 GBP (47%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £1,880 GBP at With Clarity · As of November 6, 2026
View at With Clarity

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 standard cut grade stated by the retailer rather than the lab and certified by GIA 2556808009. Listed at 7 retailers as of November 6, 2026, with prices from £994 to £1,880, a £886 spread on the same certified stone. With Clarity lists it at £1,880. 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
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 2556808009
Dimensions9.82 × 5.15 × 3.32 mm
L/W Ratio1.91
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Twinning Wisp
Top View
9.82 mm5.15 mm1.00 ctK / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 2556808009
Side View
Table 59.0%CrownGirdle: Extremely ThickPavilionCulet: NoneDepth 64.5%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £1,350 GBP|Low: £994 GBP|High: £1,861 GBP|Avg: £1,336 GBP|-2.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
With Clarity
November 6, 2026
Retailer 4£994 GBP
Retailer 3£1,100 GBP
Retailer 6£1,221 GBP
Retailer 1£1,350 GBP
Retailer 5£1,360 GBP
Retailer 2£1,378 GBP
With Clarity£1,861 GBP

14 data points across 7 retailers

7 retailers£994 GBP to £1,880 GBP

B+
Cheapest Retailer
-
£994 GBP
B+
Retailer 2
-
£1,100 GBP
View
B+
Retailer 3
-
£1,221 GBP
View
B+
Retailer 4
-
£1,350 GBP
View
B+
Retailer 5
-
£1,360 GBP
View
B+
Retailer 6
-
£1,378 GBP
View
Most Expensive
B
With Clarity
2556808009 · Nov 6
£1,880 GBP
$2,517 USD
View
6 more retailers have this diamond
Prices start from £994 GBPSave up to £886 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.

B+
1.00ct Marquise
£994 GBP