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Round|Natural|GIA

1.01ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 2557861967

Certificate GIA 2557861967

Diamond specifications and retailer prices

From £1,055 GBP
As of November 4, 2026
Save £1,421 GBP (57%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £3,447 GBP at NZ Jewellers · As of September 28, 2026
View at NZ Jewellers

About this 1.01ct natural round diamond

This 1.01ct natural round sits in the classic one-carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2557861967. Listed at 18 retailers as of November 2, 2026, with a 135% 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

1.01
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.5°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 2557861967
Dimensions6.38 × 6.43 × 3.97 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Cloud, Needle, Natural
Top View
6.38 mm6.43 mm1.01 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2557861967
Side View
Table 60.0%Crown 33.5°Girdle: MED-STKPavilion 41.6°Culet: NoneDepth 61.9%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: £1,306 GBP|Low: £1,055 GBP|High: £2,506 GBP|Avg: £1,674 GBP|+0.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 5, 2026
Retailer 6£1,055 GBP
Retailer 3£1,114 GBP
Retailer 1£1,306 GBP
Retailer 2£1,540 GBP
Retailer 7£1,736 GBP
Retailer 4£1,921 GBP
Retailer 5£2,476 GBP

40 data points across 7 retailers

18 retailers£1,055 GBP to £2,476 GBP

A
Cheapest Retailer
-
£1,055 GBP
A
Retailer 2
-
£1,114 GBP
View
A
Retailer 3
-
£1,306 GBP
View
B+
Retailer 4
-
£1,321 GBP
View
B+
Retailer 5
-
£1,323 GBP
View
Retailer 6
-
£1,413 GBP
View
Price last confirmed 39 days ago
Retailer 7
-
£1,413 GBP
View
Price last confirmed 29 days ago
Retailer 8
-
£1,413 GBP
View
Price last confirmed 29 days ago
B+
Retailer 9
-
£1,419 GBP
View
Retailer 10
-
£1,471 GBP
View
Price last confirmed 10 days ago
B+
Retailer 11
-
£1,515 GBP
View
B+
Retailer 12
-
£1,540 GBP
View
Retailer 13
-
£1,631 GBP
View
Price last confirmed 38 days ago
B+
Retailer 14
-
£1,736 GBP
View
B
Retailer 15
-
£1,921 GBP
View
B
Retailer 16
-
£2,476 GBP
View
Retailer 17
-
£3,447 GBP
View
Price last confirmed 34 days ago
Most Expensive
NZ Jewellers
8d1b63ea-2986-4b81-a6cd-327223e6f70d · Sep 28
£3,447 GBP
$4,639 USD
View
Price last confirmed 39 days ago
17 more retailers have this diamond
Prices start from £1,055 GBPSave up to £1,421 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.

A
1.01ct Round
£1,055 GBP