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Heart|Natural|GIA

1.21ct I SI1 Heart Natural Diamond

EX • I/SI1 • GIA 3535119174

Certificate GIA 3535119174

Diamond specifications and retailer prices

From £993 GBP
$1,329 USD
As of November 6, 2026
1 retailer carries this diamond
Only listing: £993 GBP at The Diamond Guys
Only one retailer lists this diamond right now, and it is shown above, so there is nothing to unlock. Similar diamonds are carried by several retailers.
View at The Diamond Guys

About this 1.21ct natural heart diamond

This 1.21ct natural heart sits in the classic one-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 3535119174. Listed at a single retailer as of November 6, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. 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

1.21
Carat
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.72°
Pavilion angle38.12°
OriginNatural
Grading LabGIA
CertificateGIA 3535119174
Dimensions6.33 × 7.44 × 4.35 mm
L/W Ratio1.18
Top View
6.33 mm7.44 mm1.21 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 3535119174
Side View
Table 58.0%Crown 38.72°Girdle: MED-VTKPavilion 38.12°Culet: NoneDepth 58.4%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 6
Current: £1,527 GBP|Low: £619 GBP|High: £1,798 GBP|Avg: £1,162 GBP|-0.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
The Diamond Guys
September 18, 2026
Retailer 7£619 GBP
Retailer 3£778 GBP
Retailer 2£908 GBP
Retailer 4£972 GBP
The Diamond Guys£993 GBP
Retailer 6£1,232 GBP
Retailer 9£1,408 GBP
Retailer 5£1,510 GBP
Retailer 1£1,527 GBP
Retailer 8£1,636 GBP

75 data points across 10 retailers

1 retailer

B+
The Diamond Guys
1932590006 · Nov 6
£993 GBP
$1,329 USD
View

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.

B+
1.21ct Heart
£993 GBP