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Heart|Natural|GIA

1.33ct I SI1 Heart Natural Diamond

EX • I/SI1 • GIA 3545115877

Certificate GIA 3545115877

Diamond specifications and retailer prices

From £1,494 GBP
As of November 6, 2026
Save £296 GBP (17%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £1,790 GBP at Blue Nile · As of November 5, 2026
View at Blue Nile

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 SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 3545115877. Listed at 5 retailers as of November 5, 2026, with prices from £1,494 to £1,790, a £296 spread on the same certified stone. Blue Nile lists it at £1,790. 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
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 3545115877
Dimensions6.97 × 7.64 × 4.53 mm
L/W Ratio1.10
Top View
6.97 mm7.64 mm1.33 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 3545115877
Side View
Table 58.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 59.3%

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 6
Current: £1,790 GBP|Low: £1,471 GBP|High: £2,226 GBP|Avg: £1,814 GBP|-19.6%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 4£1,494 GBP
Retailer 3£1,502 GBP
Retailer 2£1,626 GBP
Retailer 5£1,714 GBP
Blue Nile£1,790 GBP
Retailer 6£2,180 GBP

41 data points across 6 retailers

5 retailers£1,494 GBP to £1,790 GBP

A
Cheapest Retailer
-
£1,494 GBP
A
Retailer 2
-
£1,502 GBP
View
Final sale: no returns
A
Retailer 3
-
£1,626 GBP
View
A
Retailer 4
-
£1,714 GBP
View
Most Expensive
A
Blue Nile
27492901 · Nov 5
£1,790 GBP
$2,396 USD
View
4 more retailers have this diamond
Prices start from £1,494 GBPSave up to £296 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
£1,494 GBP