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Heart|Natural|GIA

1.33ct I SI2 Heart Natural Diamond

EX • I/SI2 • GIA 6512405390

Certificate GIA 6512405390

Diamond specifications and retailer prices

From £2,246 GBP
As of November 4, 2026
Save £2,846 GBP (56%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £5,092 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.33ct natural heart diamond

This 1.33ct natural heart sits in the one-and-a-quarter to one-and-a-half carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6512405390. Listed at 19 retailers as of November 4, 2026, with prices from £2,246 to £5,092, a £2,846 spread on the same certified stone. NZ Jewellers lists it at £5,092. 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

1.33
Carat
I
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle43.68°
Pavilion angle39.45°
OriginNatural
Grading LabGIA
CertificateGIA 6512405390
Dimensions6.68 × 7.51 × 4.47 mm
L/W Ratio1.12
Top View
6.68 mm7.51 mm1.33 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6512405390
Side View
Table 60.0%Crown 43.68°Girdle: MED-THKPavilion 39.45°Culet: NoneDepth 59.5%

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 4
Current: £5,092 GBP|Low: £1,919 GBP|High: £5,092 GBP|Avg: £3,158 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 6, 2026
Retailer 12£2,262 GBP
Retailer 8£2,304 GBP
Retailer 9£2,444 GBP
Retailer 11£2,648 GBP
Retailer 13£2,648 GBP
Retailer 10£2,750 GBP
Retailer 5£2,801 GBP
Retailer 6£2,960 GBP
Retailer 3£3,056 GBP
Retailer 2£3,357 GBP
Retailer 4£4,223 GBP
Retailer 7£4,888 GBP
NZ Jewellers£5,092 GBP

43 data points across 13 retailers

19 retailers£2,246 GBP to £5,092 GBP

A
Cheapest Retailer
-
£2,246 GBP
A
Retailer 2
-
£2,262 GBP
View
B+
Retailer 3
-
£2,303 GBP
View
B+
Retailer 4
-
£2,304 GBP
View
B+
Retailer 5
-
£2,350 GBP
View
B+
Retailer 6
-
£2,444 GBP
View
Final sale: no returns
B+
Retailer 7
-
£2,648 GBP
View
Retailer 8
-
£2,648 GBP
View
Price last confirmed 9 days ago
B+
Retailer 9
-
£2,652 GBP
View
B+
Retailer 10
-
£2,750 GBP
View
Retailer 11
-
£2,801 GBP
View
Price last confirmed 15 days ago
B
Retailer 12
-
£2,879 GBP
View
B+
Retailer 13
-
£2,960 GBP
View
Retailer 14
-
£3,056 GBP
View
Price last confirmed 62 days ago
B
Retailer 15
-
£3,056 GBP
View
Retailer 16
-
£3,357 GBP
View
B
Retailer 17
-
£4,223 GBP
View
B
Retailer 18
-
£4,888 GBP
View
Most Expensive
B
NZ Jewellers
f5f8786c-eb15-4f22-ba81-4ec7ed7f19c8 · Nov 5
£5,092 GBP
$6,816 USD
View
18 more retailers have this diamond
Prices start from £2,246 GBPSave up to £2,846 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
1.33ct Heart
£2,246 GBP