Round|Natural|GIA

1.40ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 6541638434

Certificate GIA 6541638434

Diamond specifications and retailer prices

From £2,385 GBP
As of November 5, 2026
Save £1,751 GBP (42%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £4,321 GBP at NZ Jewellers · As of September 26, 2026
View at NZ Jewellers

About this 1.4ct natural round diamond

This 1.4ct natural round sits in the one-and-a-quarter to one-and-a-half carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6541638434. Listed at 11 retailers as of November 4, 2026, with a 73% 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

1.40
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6541638434
Dimensions7.14 × 7.09 × 4.43 mm
L/W Ratio1.01
Star length50%
Top View
7.14 mm7.09 mm1.40 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6541638434
Side View
Table 58.0%Crown 36°GirdlePavilion 40.6°Culet: NoneDepth 62.2%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £2,535 GBP|Low: £2,385 GBP|High: £4,455 GBP|Avg: £3,010 GBP|-5.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 6£2,385 GBP
Retailer 1£2,535 GBP
Retailer 2£2,881 GBP
Retailer 3£2,887 GBP
Retailer 4£3,027 GBP
Retailer 5£4,136 GBP

44 data points across 6 retailers

11 retailers£2,385 GBP to £4,136 GBP

B+
Cheapest Retailer
-
£2,385 GBP
Retailer 2
-
£2,480 GBP
View
Price last confirmed 29 days ago
Retailer 3
-
£2,480 GBP
View
Price last confirmed 29 days ago
B+
Retailer 4
-
£2,535 GBP
View
Retailer 5
-
£2,575 GBP
View
Price last confirmed 38 days ago
Retailer 6
-
£2,862 GBP
View
Price last confirmed 38 days ago
B
Retailer 7
-
£2,881 GBP
View
B+
Retailer 8
-
£2,887 GBP
View
B
Retailer 9
-
£3,027 GBP
View
B
Retailer 10
-
£4,136 GBP
View
Most Expensive
NZ Jewellers
335be264-81b7-4ae0-b9b7-ad49c3fbd800 · Sep 26
£4,321 GBP
$5,816 USD
View
Price last confirmed 40 days ago
10 more retailers have this diamond
Prices start from £2,385 GBPSave up to £1,751 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.

B+
1.40ct Round
£2,385 GBP