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Marquise|Natural|GIA

1.00ct D SI1 Marquise Natural Diamond

EX • D/SI1 • GIA 7556561245

Certificate GIA 7556561245

Diamond specifications and retailer prices

From £2,886 GBP
As of November 6, 2026
Save £2,865 GBP (50%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: £6,314 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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 7556561245. Listed at 24 retailers as of November 4, 2026, with a 99% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.00
Carat
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryExcellent
FluorescenceFaint
Crown angle39.57°
Pavilion angle37.92°
OriginNatural
Grading LabGIA
CertificateGIA 7556561245
Dimensions9.89 × 5.21 × 3.12 mm
L/W Ratio1.90
Culet sizeNone
Top View
9.89 mm5.21 mm1.00 ctD / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceFaint
CertificateGIA 7556561245
Side View
Table 60.0%Crown 39.57°Girdle: STK-THKPavilion 37.92°Culet: NoneDepth 59.9%

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: £3,825 GBP|Low: £2,414 GBP|High: £6,084 GBP|Avg: £3,613 GBP
Retailer 1
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
Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
Retailer 21
November 6, 2026
Retailer 10£2,414 GBP
Retailer 14£2,690 GBP
Retailer 19£2,886 GBP
Retailer 13£2,914 GBP
Retailer 18£3,081 GBP
Retailer 9£3,100 GBP
Retailer 21£3,108 GBP
Retailer 20£3,262 GBP
Retailer 5£3,316 GBP
Retailer 12£3,544 GBP
Retailer 6£3,570 GBP
Retailer 2£3,691 GBP
Retailer 4£3,691 GBP
Retailer 11£3,693 GBP
Retailer 7£3,805 GBP
Retailer 3£3,810 GBP
Retailer 1£3,825 GBP
Retailer 17£4,080 GBP
Retailer 8£4,168 GBP
Retailer 15£4,418 GBP
Retailer 16£5,751 GBP

32 data points across 21 retailers

24 retailers£2,886 GBP to £5,751 GBP

B+
Cheapest Retailer
-
£2,886 GBP
B+
Retailer 2
-
£3,081 GBP
View
B+
Retailer 3
-
£3,108 GBP
View
B+
Retailer 4
-
£3,262 GBP
View
B+
Retailer 5
-
£3,316 GBP
View
Retailer 6
-
£3,420 GBP
View
Price last confirmed 29 days ago
Retailer 7
-
£3,420 GBP
View
Price last confirmed 45 days ago
Retailer 8
-
£3,420 GBP
View
Price last confirmed 36 days ago
Retailer 9
-
£3,420 GBP
View
Price last confirmed 29 days ago
B+
Retailer 10
-
£3,544 GBP
View
B+
Retailer 11
-
£3,570 GBP
View
B+
Retailer 12
-
£3,691 GBP
View
B+
Retailer 13
-
£3,691 GBP
View
Retailer 14
-
£3,805 GBP
View
Price last confirmed 28 days ago
B
Retailer 15
-
£3,810 GBP
View
B
Retailer 16
-
£3,825 GBP
View
Retailer 17
-
£3,946 GBP
View
Price last confirmed 45 days ago
Retailer 18
-
£3,946 GBP
View
Price last confirmed 28 days ago
B
Retailer 19
-
£4,080 GBP
View
Retailer 20
-
£4,168 GBP
View
Price last confirmed 28 days ago
B
Retailer 21
-
£4,418 GBP
View
B
Retailer 22
-
£5,751 GBP
View
Retailer 23
-
£6,314 GBP
View
Price last confirmed 47 days ago
Most Expensive
NZ Jewellers
7c3d07c8-2434-4443-8ee7-df7588fa8ebf · Sep 30
£6,314 GBP
$8,451 USD
View
Price last confirmed 37 days ago
23 more retailers have this diamond
Prices start from £2,886 GBPSave up to £2,865 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
£2,886 GBP