Round|Natural|GIA

1.40ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 5556327803

Certificate GIA 5556327803

Diamond specifications and retailer prices

From £2,489 GBP
As of November 5, 2026
Save £1,828 GBP (42%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £4,510 GBP at NZ Jewellers · As of October 3, 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 5556327803. 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 5556327803
Dimensions7.07 × 7.12 × 4.46 mm
L/W Ratio1.01
Star length50%
Culet sizeNone
Key to symbols
Feather, Crystal, Cloud, Needle
Top View
7.07 mm7.12 mm1.40 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5556327803
Side View
Table 57.0%Crown 36°GirdlePavilion 40.6°Culet: NoneDepth 62.8%

Caratlytics Score

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

Price History

Last verified: Nov 5
Current: £2,662 GBP|Low: £2,489 GBP|High: £4,503 GBP|Avg: £3,170 GBP|-1.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 6£2,489 GBP
Retailer 1£2,662 GBP
Retailer 3£3,000 GBP
Retailer 2£3,006 GBP
Retailer 4£3,159 GBP
Retailer 5£4,318 GBP

45 data points across 6 retailers

11 retailers£2,489 GBP to £4,318 GBP

B+
Cheapest Retailer
-
£2,489 GBP
Retailer 2
-
£2,589 GBP
View
Price last confirmed 29 days ago
Retailer 3
-
£2,589 GBP
View
Price last confirmed 29 days ago
B+
Retailer 4
-
£2,662 GBP
View
Retailer 5
-
£2,763 GBP
View
Price last confirmed 38 days ago
Retailer 6
-
£2,987 GBP
View
Price last confirmed 35 days ago
B+
Retailer 7
-
£3,000 GBP
View
B+
Retailer 8
-
£3,006 GBP
View
B
Retailer 9
-
£3,159 GBP
View
B
Retailer 10
-
£4,318 GBP
View
Most Expensive
NZ Jewellers
f26d75f1-4073-4103-856b-0821ff293602 · Oct 3
£4,510 GBP
$6,070 USD
View
Price last confirmed 34 days ago
10 more retailers have this diamond
Prices start from £2,489 GBPSave up to £1,828 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
£2,489 GBP