Marquise|Natural|GIA

1.20ct D SI1 Marquise Natural Diamond

EX • D/SI1 • GIA 6561258837

Certificate GIA 6561258837

Diamond specifications and retailer prices

From £4,181 GBP
As of November 5, 2026
Save £3,634 GBP (47%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £7,923 GBP at NZ Jewellers · As of October 17, 2026
View at NZ Jewellers

About this 1.2ct natural marquise diamond

This 1.2ct 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 6561258837. Listed at 21 retailers as of November 4, 2026, with a 87% 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

1.20
Carat
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6561258837
Dimensions10.60 × 5.52 × 3.42 mm
L/W Ratio1.92
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Cavity, Cloud, Needle, Indented Natural, Natural
Top View
10.60 mm5.52 mm1.20 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6561258837
Side View
Table 57.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 62.0%

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 5
Current: £5,160 GBP|Low: £3,519 GBP|High: £7,815 GBP|Avg: £4,827 GBP|+10.4%
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
November 6, 2026
Retailer 7£3,519 GBP
Retailer 8£4,052 GBP
Retailer 4£4,146 GBP
Retailer 11£4,181 GBP
Retailer 16£4,520 GBP
Retailer 12£4,639 GBP
Retailer 6£4,669 GBP
Retailer 5£4,682 GBP
Retailer 9£4,745 GBP
Retailer 15£4,909 GBP
Retailer 13£4,923 GBP
Retailer 2£5,139 GBP
Retailer 1£5,160 GBP
Retailer 3£6,447 GBP
Retailer 10£6,490 GBP
Retailer 14£7,815 GBP

34 data points across 16 retailers

21 retailers£4,181 GBP to £7,815 GBP

Retailer 1
-
£3,519 GBP
Price last confirmed 12 days ago
Retailer 2
-
£3,910 GBP
View
Price last confirmed 16 days ago
Retailer 3
-
£4,052 GBP
View
Price last confirmed 15 days ago
Retailer 4
-
£4,146 GBP
View
Price last confirmed 17 days ago
B+
Retailer 5
-
£4,181 GBP
View
Retailer 6
-
£4,520 GBP
View
Price last confirmed 14 days ago
B
Retailer 7
-
£4,639 GBP
View
Retailer 8
-
£4,669 GBP
View
Price last confirmed 15 days ago
Retailer 9
-
£4,682 GBP
View
Price last confirmed 28 days ago
Retailer 10
-
£4,737 GBP
View
Price last confirmed 22 days ago
Retailer 11
-
£4,737 GBP
View
Price last confirmed 21 days ago
Retailer 12
-
£4,737 GBP
View
Price last confirmed 20 days ago
B
Retailer 13
-
£4,745 GBP
View
B
Retailer 14
-
£4,909 GBP
View
Final sale: no returns
B
Retailer 15
-
£4,923 GBP
View
B
Retailer 16
-
£5,160 GBP
View
Retailer 17
-
£5,466 GBP
View
Price last confirmed 19 days ago
Retailer 18
-
£6,447 GBP
View
Price last confirmed 15 days ago
B
Retailer 19
-
£6,490 GBP
View
B
Retailer 20
-
£7,815 GBP
View
Most Expensive
NZ Jewellers
b58c3e6e-0cfd-4753-84d8-470d4dc6847e · Oct 17
£7,923 GBP
$10,605 USD
View
Price last confirmed 20 days ago
20 more retailers have this diamond
Prices start from £4,181 GBPSave up to £3,634 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+
1.20ct Marquise
£4,181 GBP