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Round|Natural|IGI

1.00ct K I1 Round Natural Diamond

VG • K/I1 • IGI 523290684

Shape and cutting style on the report: Round brilliant

Certificate IGI 523290684

Diamond specifications and retailer prices

From £477 GBP
As of November 5, 2026
Save £1,295 GBP (73%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £1,772 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1ct natural round diamond

This 1ct natural round sits in the classic one-carat band, graded K colour (faint-tinted) and I1 clarity (included), with a very-good cut grade and certified by IGI 523290684. Listed at 11 retailers as of November 5, 2026, with prices from £477 to £1,772, a £1,295 spread on the same certified stone. NZ Jewellers lists it at £1,772. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.00
Carat
K
Colour
I1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryGood
FluorescenceNone
Crown angle35.9°
Pavilion angle40.1°
OriginNatural
Grading LabIGI
CertificateIGI 523290684
Dimensions6.32 × 6.34 × 3.85 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizeNone
Top View
6.32 mm6.34 mm1.00 ctK / I1
OriginNatural
CutVery Good
PolishExcellent
SymmetryGood
FluorescenceNone
CertificateIGI 523290684
Side View
Table 62.5%Crown 35.9°Girdle: STK-THKPavilion 40.1°Culet: NoneDepth 60.8%

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: £477 GBP|Low: £477 GBP|High: £802 GBP|Avg: £625 GBP|-3.9%
Retailer 1
Retailer 2
Retailer 3
November 5, 2026
Retailer 1£477 GBP
Retailer 3£565 GBP
Retailer 2£796 GBP

39 data points across 3 retailers

11 retailers£477 GBP to £1,772 GBP

B+
Cheapest Retailer
-
£477 GBP
Retailer 2
-
£565 GBP
View
Price last confirmed 8 days ago
Retailer 3
-
£565 GBP
View
Price last confirmed 28 days ago
B+
Retailer 4
-
£565 GBP
View
B+
Retailer 5
-
£574 GBP
View
Retailer 6
-
£587 GBP
View
Price last confirmed 38 days ago
Retailer 7
-
£652 GBP
View
Price last confirmed 28 days ago
B+
Retailer 8
-
£652 GBP
View
B+
Retailer 9
-
£796 GBP
View
Retailer 10
-
£1,772 GBP
View
Price last confirmed 39 days ago
Most Expensive
C
NZ Jewellers
a6543d19-6375-4c6a-8455-2c6473f0b786 · Nov 5
£1,772 GBP
$2,385 USD
View
10 more retailers have this diamond
Prices start from £477 GBPSave up to £1,295 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+
1.00ct Round
£477 GBP