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Round|Natural|GIA

1.20ct K SI2 Round Natural Diamond

EX • K/SI2 • GIA 5566270858

Certificate GIA 5566270858

Diamond specifications and retailer prices

From £881 GBP
As of November 5, 2026
Save £786 GBP (47%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £1,667 GBP at Wholesale Diamonds Direct · As of November 4, 2026
View at Wholesale Diamonds Direct

About this 1.2ct natural round diamond

This 1.2ct natural round sits in the classic one-carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5566270858. Listed at 8 retailers as of November 4, 2026, with prices from £881 to £1,667, a £786 spread on the same certified stone. Wholesale Diamonds Direct lists it at £1,667. 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
K
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 5566270858
Dimensions6.74 × 4.23 × 4.23 mm
L/W Ratio1.59
Culet sizeNone
Top View
6.74 mm4.23 mm1.20 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 5566270858
Side View
Table 58.0%Crown 36.5°Girdle: THN-STKPavilion 41°Culet: NoneDepth 62.6%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £1,441 GBP|Low: £877 GBP|High: £2,454 GBP|Avg: £1,455 GBP|-26.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Wholesale Diamonds Direct
November 5, 2026
Retailer 2£881 GBP
Retailer 5£1,028 GBP
Retailer 6£1,100 GBP
Retailer 4£1,316 GBP
Retailer 3£1,344 GBP
Retailer 7£1,388 GBP
Retailer 1£1,441 GBP
Wholesale Diamonds Direct£1,667 GBP

38 data points across 8 retailers

8 retailers£881 GBP to £1,667 GBP

A
Cheapest Retailer
-
£881 GBP
A
Retailer 2
-
£1,028 GBP
View
A
Retailer 3
-
£1,100 GBP
View
A
Retailer 4
-
£1,316 GBP
View
A
Retailer 5
-
£1,344 GBP
View
A
Retailer 6
-
£1,388 GBP
View
A
Retailer 7
-
£1,441 GBP
View
Most Expensive
B+
Wholesale Diamonds Direct
403843574 · Nov 4
£1,667 GBP
$2,244 USD
View
7 more retailers have this diamond
Prices start from £881 GBPSave up to £786 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.

A
1.20ct Round
£881 GBP