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Marquise|Natural|GIA

1.21ct K SI2 Marquise Natural Diamond

GD • K/SI2 • GIA 6551370755

Certificate GIA 6551370755

Diamond specifications and retailer prices

From £1,508 GBP
As of November 6, 2026
Save £964 GBP (39%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £2,472 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 K colour (faint-tinted) and SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 6551370755. Listed at 8 retailers as of November 6, 2026, with prices from £1,508 to £2,472, a £964 spread on the same certified stone. Wholesale Diamonds Direct lists it at £2,472. 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

1.21
Carat
K
Colour
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41.53°
Pavilion angle39.85°
OriginNatural
Grading LabGIA
CertificateGIA 6551370755
Dimensions11.36 × 5.05 × 3.42 mm
L/W Ratio2.25
Culet sizeNone
Top View
11.36 mm5.05 mm1.21 ctK / SI2
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6551370755
Side View
Table 57.0%Crown 41.53°Girdle: STK-VTKPavilion 39.85°Culet: NoneDepth 67.6%

Caratlytics Score

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

Price History

Last verified: Nov 6
Current: £1,508 GBP|Low: £1,198 GBP|High: £2,634 GBP|Avg: £1,834 GBP|-6.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Wholesale Diamonds Direct
November 6, 2026
Retailer 2£1,198 GBP
Retailer 1£1,508 GBP
Retailer 8£1,508 GBP
Retailer 7£1,614 GBP
Retailer 4£1,652 GBP
Retailer 6£1,656 GBP
Retailer 10£1,920 GBP
Retailer 5£1,922 GBP
Retailer 3£2,134 GBP
Retailer 9£2,344 GBP
Wholesale Diamonds Direct£2,472 GBP

19 data points across 11 retailers

8 retailers£1,508 GBP to £2,472 GBP

B+
Cheapest Retailer
-
£1,508 GBP
B+
Retailer 2
-
£1,614 GBP
View
B+
Retailer 3
-
£1,652 GBP
View
B+
Retailer 4
-
£1,656 GBP
View
B+
Retailer 5
-
£1,920 GBP
View
B+
Retailer 6
-
£1,922 GBP
View
B
Retailer 7
-
£2,134 GBP
View
Most Expensive
B
Wholesale Diamonds Direct
642297446 · Nov 6
£2,472 GBP
$3,309 USD
View
7 more retailers have this diamond
Prices start from £1,508 GBPSave up to £964 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
£1,508 GBP