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Round|Natural|GIA

0.90ct K SI1 Round Natural Diamond

VG • K/SI1 • GIA 1558242021

Certificate GIA 1558242021

Diamond specifications and retailer prices

From £551 GBP
As of November 6, 2026
Save £1,798 GBP (77%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £2,349 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 0.9ct natural round diamond

This 0.9ct natural round sits in the just-under-one-carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a very-good cut grade and certified by GIA 1558242021. Listed at 17 retailers as of November 5, 2026, with prices from £551 to £2,349, a £1,798 spread on the same certified stone. NZ Jewellers lists it at £2,349. 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

0.90
Carat
K
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceStrong
Crown angle38°
Pavilion angle40.2°
OriginNatural
Grading LabGIA
CertificateGIA 1558242021
Dimensions5.94 × 6.03 × 3.85 mm
L/W Ratio1.02
Girdle conditionFaceted
Key to symbols
Crystal
Top View
5.94 mm6.03 mm0.90 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceStrong
CertificateGIA 1558242021
Side View
Table 58.0%Crown 38°Girdle: STK-THKPavilion 40.2°Culet: NoneDepth 64.3%

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 6
Current: £2,349 GBP|Low: £551 GBP|High: £2,349 GBP|Avg: £1,040 GBP|+26.8%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
November 6, 2026
Retailer 5£551 GBP
Retailer 11£621 GBP
Retailer 8£669 GBP
Retailer 6£733 GBP
Retailer 7£759 GBP
Retailer 9£770 GBP
Retailer 13£776 GBP
Retailer 16£840 GBP
Retailer 3£865 GBP
Retailer 10£892 GBP
Retailer 4£1,045 GBP
Retailer 15£1,049 GBP
Retailer 12£1,097 GBP
Retailer 14£1,370 GBP
Retailer 2£1,780 GBP
NZ Jewellers£2,349 GBP

25 data points across 16 retailers

17 retailers£551 GBP to £2,349 GBP

A
Cheapest Retailer
-
£551 GBP
A
Retailer 2
-
£621 GBP
View
A
Retailer 3
-
£669 GBP
View
B+
Retailer 4
-
£733 GBP
View
Retailer 5
-
£759 GBP
View
Price last confirmed 8 days ago
B+
Retailer 6
-
£770 GBP
View
B+
Retailer 7
-
£776 GBP
View
Retailer 8
-
£778 GBP
View
Price last confirmed 38 days ago
B+
Retailer 9
-
£840 GBP
View
B+
Retailer 10
-
£865 GBP
View
B+
Retailer 11
-
£892 GBP
View
B
Retailer 12
-
£1,045 GBP
View
B+
Retailer 13
-
£1,049 GBP
View
B
Retailer 14
-
£1,097 GBP
View
B
Retailer 15
-
£1,370 GBP
View
B
Retailer 16
-
£1,780 GBP
View
Most Expensive
C
NZ Jewellers
2242df72-53f1-4102-b6f8-e40cc2fbb2a0 · Nov 5
£2,349 GBP
$3,162 USD
View
16 more retailers have this diamond
Prices start from £551 GBPSave up to £1,798 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
0.90ct Round
£551 GBP