Round|Natural|GIA

1.40ct M SI1 Round Natural Diamond

EX • M/SI1 • GIA 6542434212

Certificate GIA 6542434212

Diamond specifications and retailer prices

From £1,731 GBP
As of November 5, 2026
Save £418 GBP (19%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £3,956 GBP at NZ Jewellers · As of September 12, 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 M colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6542434212. Listed at 11 retailers as of November 5, 2026, with a relatively tight 24% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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
M
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 6542434212
Dimensions7.15 × 7.10 × 4.47 mm
L/W Ratio1.01
Star length50%
Top View
7.15 mm7.10 mm1.40 ctM / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6542434212
Side View
Table 56.0%Crown 36.5°GirdlePavilion 40.8°Culet: NoneDepth 62.8%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 5
Current: £2,114 GBP|Low: £1,724 GBP|High: £2,300 GBP|Avg: £1,925 GBP|-6.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 5, 2026
Retailer 5£1,724 GBP
Retailer 3£1,731 GBP
Retailer 4£1,892 GBP
Retailer 1£2,114 GBP
Retailer 2£2,149 GBP

25 data points across 5 retailers

11 retailers£1,731 GBP to £2,149 GBP

B+
Cheapest Retailer
-
£1,731 GBP
Retailer 2
-
£1,732 GBP
View
Price last confirmed 29 days ago
Retailer 3
-
£1,732 GBP
View
Price last confirmed 29 days ago
Retailer 4
-
£1,812 GBP
View
Price last confirmed 38 days ago
Retailer 5
-
£1,892 GBP
View
Price last confirmed 53 days ago
Retailer 6
-
£1,999 GBP
View
Price last confirmed 38 days ago
B
Retailer 7
-
£2,114 GBP
View
B
Retailer 8
-
£2,149 GBP
View
Retailer 9
-
£2,184 GBP
View
Price last confirmed 61 days ago
Retailer 10
-
£3,621 GBP
View
Price last confirmed 41 days ago
Most Expensive
NZ Jewellers
bedc1264-9bd6-4184-a4a2-8c4d200a3abd · Sep 12
£3,956 GBP
$5,325 USD
View
Price last confirmed 54 days ago
10 more retailers have this diamond
Prices start from £1,731 GBPSave up to £418 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
£1,731 GBP