Heart|Natural|GIA

1.20ct G SI1 Heart Natural Diamond

EX • G/SI1 • GIA 6541388165

Certificate GIA 6541388165

Diamond specifications and retailer prices

From £1,817 GBP
As of November 6, 2026
Save £2,155 GBP (54%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £4,554 GBP at Queensmith · As of October 28, 2026
View at Queensmith

About this 1.2ct natural heart diamond

This 1.2ct natural heart sits in the classic one-carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6541388165. Listed at 19 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
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6541388165
Dimensions6.79 × 7.30 × 4.12 mm
L/W Ratio1.08
Top View
6.79 mm7.30 mm1.20 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6541388165
Side View
Table 63.0%CrownGirdle: THN-THKPavilionCulet: NoneDepth 56.5%

Caratlytics Score

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

Price History

Last verified: Nov 6
Current: £4,554 GBP|Low: £1,817 GBP|High: £4,554 GBP|Avg: £2,809 GBP
Queensmith
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
November 6, 2026
Retailer 5£1,817 GBP
Retailer 2£1,886 GBP
Retailer 13£2,126 GBP
Retailer 14£2,159 GBP
Retailer 7£2,198 GBP
Retailer 8£2,310 GBP
Retailer 3£2,312 GBP
Retailer 11£2,464 GBP
Retailer 6£2,489 GBP
Retailer 10£2,521 GBP
Retailer 4£2,563 GBP
Retailer 9£2,772 GBP
Retailer 12£2,907 GBP
Retailer 15£3,972 GBP
Queensmith£4,554 GBP

22 data points across 15 retailers

19 retailers£1,817 GBP to £3,972 GBP

B+
Cheapest Retailer
-
£1,817 GBP
A
Retailer 2
-
£1,886 GBP
View
B+
Retailer 3
-
£2,126 GBP
View
B+
Retailer 4
-
£2,159 GBP
View
B+
Retailer 5
-
£2,189 GBP
View
B+
Retailer 6
-
£2,198 GBP
View
Final sale: no returns
B+
Retailer 7
-
£2,238 GBP
View
B+
Retailer 8
-
£2,310 GBP
View
B+
Retailer 9
-
£2,312 GBP
View
B+
Retailer 10
-
£2,451 GBP
View
B+
Retailer 11
-
£2,464 GBP
View
B+
Retailer 12
-
£2,489 GBP
View
B+
Retailer 13
-
£2,521 GBP
View
B+
Retailer 14
-
£2,563 GBP
View
Retailer 15
-
£2,569 GBP
View
Price last confirmed 35 days ago
B+
Retailer 16
-
£2,772 GBP
View
B
Retailer 17
-
£2,907 GBP
View
B
Retailer 18
-
£3,972 GBP
View
Most Expensive
Queensmith
6541388165 · Oct 28
£4,554 GBP
View
Price last confirmed 9 days ago
18 more retailers have this diamond
Prices start from £1,817 GBPSave up to £2,155 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 Heart
£1,817 GBP