Round|Natural|GIA

1.40ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 2537732539

Certificate GIA 2537732539

Diamond specifications and retailer prices

From £2,526 GBP
As of November 5, 2026
Save £1,852 GBP (42%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £4,652 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2537732539. Listed at 14 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 angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 2537732539
Dimensions7.11 × 7.06 × 4.42 mm
L/W Ratio1.01
Star length50%
Top View
7.11 mm7.06 mm1.40 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2537732539
Side View
Table 59.0%Crown 36°GirdlePavilion 40.8°Culet: NoneDepth 62.4%

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: £2,699 GBP|Low: £2,526 GBP|High: £4,465 GBP|Avg: £3,093 GBP|+0.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 6£2,526 GBP
Retailer 7£2,670 GBP
Retailer 1£2,699 GBP
Retailer 2£3,043 GBP
Retailer 4£3,049 GBP
Retailer 3£3,204 GBP
Retailer 5£4,378 GBP

42 data points across 7 retailers

14 retailers£2,526 GBP to £4,378 GBP

B+
Cheapest Retailer
-
£2,526 GBP
Retailer 2
-
£2,625 GBP
View
Price last confirmed 29 days ago
Retailer 3
-
£2,625 GBP
View
Price last confirmed 29 days ago
Retailer 4
-
£2,670 GBP
View
Price last confirmed 55 days ago
B+
Retailer 5
-
£2,699 GBP
View
Retailer 6
-
£2,726 GBP
View
Price last confirmed 38 days ago
Retailer 7
-
£3,028 GBP
View
Price last confirmed 38 days ago
B+
Retailer 8
-
£3,043 GBP
View
B+
Retailer 9
-
£3,049 GBP
View
Retailer 10
-
£3,080 GBP
View
Price last confirmed 56 days ago
B
Retailer 11
-
£3,204 GBP
View
B
Retailer 12
-
£4,378 GBP
View
Retailer 13
-
£4,573 GBP
View
Price last confirmed 41 days ago
Most Expensive
NZ Jewellers
1f564d4d-8326-4a62-ae83-982157bd16b6 · Sep 12
£4,652 GBP
$6,261 USD
View
Price last confirmed 54 days ago
13 more retailers have this diamond
Prices start from £2,526 GBPSave up to £1,852 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
£2,526 GBP