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Heart|Natural|GIA

1.20ct K SI2 Heart Natural Diamond

EX • K/SI2 • GIA 5231766973

Certificate GIA 5231766973

Diamond specifications and retailer prices

From £1,024 GBP
As of November 5, 2026
Save £1,477 GBP (59%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £2,501 GBP at NZ Jewellers · As of November 3, 2026
View at NZ Jewellers

About this 1.2ct natural heart diamond

This 1.2ct natural heart sits in the classic one-carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5231766973. Listed at 6 retailers as of November 3, 2026, with prices from £1,024 to £2,501, a £1,477 spread on the same certified stone. NZ Jewellers lists it at £2,501. 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 (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle38.91°
Pavilion angle41.33°
OriginNatural
Grading LabGIA
CertificateGIA 5231766973
Dimensions6.35 × 7.26 × 4.50 mm
L/W Ratio1.14
Top View
6.35 mm7.26 mm1.20 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 5231766973
Side View
Table 59.0%Crown 38.91°GirdlePavilion 41.33°CuletDepth 61.9%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 5
Current: £2,501 GBP|Low: £1,024 GBP|High: £2,541 GBP|Avg: £1,411 GBP|-1.6%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 4£1,024 GBP
Retailer 5£1,025 GBP
Retailer 2£1,054 GBP
Retailer 6£1,073 GBP
Retailer 7£1,251 GBP
Retailer 8£1,293 GBP
Retailer 9£1,449 GBP
Retailer 3£1,877 GBP
NZ Jewellers£2,501 GBP

27 data points across 9 retailers

6 retailers£1,024 GBP to £2,501 GBP

A
Cheapest Retailer
-
£1,024 GBP
A
Retailer 2
-
£1,025 GBP
View
A
Retailer 3
-
£1,054 GBP
View
A
Retailer 4
-
£1,073 GBP
View
B
Retailer 5
-
£1,877 GBP
View
Most Expensive
B
NZ Jewellers
6ef88574-af0f-459b-a711-ebfd9ecd2e29 · Nov 3
£2,501 GBP
$3,347 USD
View
5 more retailers have this diamond
Prices start from £1,024 GBPSave up to £1,477 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
£1,024 GBP