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Marquise|Natural|GIA

1.21ct D SI1 Marquise Natural Diamond

EX • D/SI1 • GIA 1567588621

Certificate GIA 1567588621

Diamond specifications and retailer prices

From £3,925 GBP
As of November 4, 2026
Save £3,211 GBP (45%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £7,136 GBP at Wholesale Diamonds Direct · As of November 6, 2026
View at Wholesale Diamonds Direct

About this 1.21ct natural marquise diamond

This 1.21ct 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 1567588621. Listed at 15 retailers as of November 4, 2026, with prices from £3,925 to £7,136, a £3,211 spread on the same certified stone. Wholesale Diamonds Direct lists it at £7,136. 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

1.21
Carat
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.76°
Pavilion angle40.69°
OriginNatural
Grading LabGIA
CertificateGIA 1567588621
Dimensions10.43 × 5.51 × 3.55 mm
L/W Ratio1.89
Culet sizeNone
Top View
10.43 mm5.51 mm1.21 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1567588621
Side View
Table 60.0%Crown 39.76°Girdle: MED-THKPavilion 40.69°Culet: NoneDepth 64.4%

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 4
Current: £4,436 GBP|Low: £3,925 GBP|High: £7,136 GBP|Avg: £4,964 GBP|-1.5%
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
Wholesale Diamonds Direct
November 7, 2026
Retailer 5£3,925 GBP
Retailer 10£3,995 GBP
Retailer 12£4,033 GBP
Retailer 9£4,108 GBP
Retailer 14£4,152 GBP
Retailer 13£4,210 GBP
Retailer 6£4,247 GBP
Retailer 1£4,436 GBP
Retailer 4£4,963 GBP
Retailer 8£4,977 GBP
Retailer 2£4,985 GBP
Retailer 7£5,564 GBP
Retailer 3£6,443 GBP
Retailer 11£6,764 GBP
Wholesale Diamonds Direct£7,136 GBP

24 data points across 15 retailers

15 retailers£3,925 GBP to £7,136 GBP

B+
Cheapest Retailer
-
£3,925 GBP
B+
Retailer 2
-
£3,995 GBP
View
B+
Retailer 3
-
£4,033 GBP
View
B+
Retailer 4
-
£4,108 GBP
View
B+
Retailer 5
-
£4,152 GBP
View
B+
Retailer 6
-
£4,210 GBP
View
B+
Retailer 7
-
£4,247 GBP
View
B+
Retailer 8
-
£4,436 GBP
View
B
Retailer 9
-
£4,963 GBP
View
B
Retailer 10
-
£4,977 GBP
View
B
Retailer 11
-
£4,985 GBP
View
B
Retailer 12
-
£5,564 GBP
View
B
Retailer 13
-
£6,443 GBP
View
B
Retailer 14
-
£6,764 GBP
View
Most Expensive
B
Wholesale Diamonds Direct
545946513 · Nov 6
£7,136 GBP
$9,551 USD
View
14 more retailers have this diamond
Prices start from £3,925 GBPSave up to £3,211 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+
1.21ct Marquise
£3,925 GBP