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Round|Natural|GIA

1.20ct E SI2 Round Natural Diamond

EX • E/SI2 • GIA 6551079188

Certificate GIA 6551079188

Diamond specifications and retailer prices

From £1,788 GBP
As of November 4, 2026
Save £2,135 GBP (54%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £4,525 GBP at Queensmith · As of October 28, 2026
View at Queensmith

About this 1.2ct natural round diamond

This 1.2ct natural round sits in the classic one-carat band, graded E colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6551079188. Listed at 20 retailers as of November 4, 2026, with a 119% 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
E
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle34.5°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 6551079188
Dimensions6.75 × 6.77 × 4.25 mm
L/W Ratio1.00
Top View
6.75 mm6.77 mm1.20 ctE / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6551079188
Side View
Table 58.0%Crown 34.5°Girdle: MED-STKPavilion 41.6°Culet: NoneDepth 62.8%

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 4
Current: £4,525 GBP|Low: £1,788 GBP|High: £4,543 GBP|Avg: £2,758 GBP|+2.8%
Queensmith
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 9£1,788 GBP
Retailer 6£1,868 GBP
Retailer 7£2,088 GBP
Retailer 10£2,153 GBP
Retailer 3£2,171 GBP
Retailer 4£2,419 GBP
Retailer 11£2,459 GBP
Retailer 2£2,491 GBP
Retailer 5£2,733 GBP
Retailer 8£3,923 GBP
Queensmith£4,525 GBP

33 data points across 11 retailers

20 retailers£1,788 GBP to £3,923 GBP

A
Cheapest Retailer
-
£1,788 GBP
A
Retailer 2
-
£1,868 GBP
View
A
Retailer 3
-
£2,088 GBP
View
A
Retailer 4
-
£2,153 GBP
View
A
Retailer 5
-
£2,171 GBP
View
Final sale: no returns
A
Retailer 6
-
£2,198 GBP
View
Retailer 7
-
£2,377 GBP
View
Price last confirmed 44 days ago
Retailer 8
-
£2,377 GBP
View
Price last confirmed 17 days ago
Retailer 9
-
£2,377 GBP
View
Price last confirmed 21 days ago
A
Retailer 10
-
£2,419 GBP
View
A
Retailer 11
-
£2,459 GBP
View
Retailer 12
-
£2,468 GBP
View
Price last confirmed 22 days ago
A
Retailer 13
-
£2,491 GBP
View
A
Retailer 14
-
£2,733 GBP
View
Retailer 15
-
£2,742 GBP
View
Price last confirmed 45 days ago
Retailer 16
-
£2,742 GBP
View
Price last confirmed 19 days ago
B+
Retailer 17
-
£3,923 GBP
View
Retailer 18
-
£4,141 GBP
View
Price last confirmed 46 days ago
Retailer 19
-
£4,141 GBP
View
Price last confirmed 20 days ago
Most Expensive
Queensmith
6551079188 · Oct 28
£4,525 GBP
View
Price last confirmed 8 days ago
19 more retailers have this diamond
Prices start from £1,788 GBPSave up to £2,135 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
£1,788 GBP