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Round|Natural|GIA

0.45ct K SI1 Round Natural Diamond

VG • K/SI1 • GIA 6381753831

Certificate GIA 6381753831

Diamond specifications and retailer prices

From £233 GBP
As of November 4, 2026
Save £753 GBP (76%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £986 GBP at NZ Jewellers · As of November 4, 2026
View at NZ Jewellers

About this 0.45ct natural round diamond

This 0.45ct natural round sits in the sub-half-carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a very-good cut grade and certified by GIA 6381753831. Listed at 15 retailers as of November 4, 2026, with prices from £233 to £986, a £753 spread on the same certified stone. NZ Jewellers lists it at £986. 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

0.45
Carat
K
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle38.5°
Pavilion angle39.8°
OriginNatural
Grading LabGIA
CertificateGIA 6381753831
Dimensions4.80 × 4.77 × 3.09 mm
L/W Ratio1.01
Top View
4.80 mm4.77 mm0.45 ctK / SI1
OriginNatural
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 6381753831
Side View
Table 55.0%Crown 38.5°Girdle: STK-THKPavilion 39.8°Culet: NoneDepth 64.6%

Caratlytics Score

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

Price History

Last verified: Nov 4
Current: £986 GBP|Low: £233 GBP|High: £986 GBP|Avg: £372 GBP
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 5, 2026
Retailer 5£233 GBP
Retailer 11£234 GBP
Retailer 16£251 GBP
Retailer 14£260 GBP
Retailer 8£282 GBP
Retailer 15£299 GBP
Retailer 7£301 GBP
Retailer 6£314 GBP
Retailer 4£323 GBP
Retailer 3£354 GBP
Retailer 9£382 GBP
Retailer 13£397 GBP
Retailer 10£400 GBP
Retailer 2£473 GBP
Retailer 12£593 GBP
NZ Jewellers£986 GBP

33 data points across 16 retailers

15 retailers£233 GBP to £986 GBP

A
Cheapest Retailer
-
£233 GBP
A
Retailer 2
-
£234 GBP
View
Retailer 3
-
£251 GBP
View
Price last confirmed 8 days ago
B+
Retailer 4
-
£260 GBP
View
B+
Retailer 5
-
£299 GBP
View
B+
Retailer 6
-
£301 GBP
View
B+
Retailer 7
-
£314 GBP
View
B+
Retailer 8
-
£323 GBP
View
B+
Retailer 9
-
£354 GBP
View
B+
Retailer 10
-
£382 GBP
View
B
Retailer 11
-
£397 GBP
View
B+
Retailer 12
-
£400 GBP
View
B
Retailer 13
-
£473 GBP
View
B
Retailer 14
-
£593 GBP
View
Most Expensive
C
NZ Jewellers
4b62d1b1-7972-4fc0-8517-acb5d204728c · Nov 4
£986 GBP
$1,327 USD
View
14 more retailers have this diamond
Prices start from £233 GBPSave up to £753 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
0.45ct Round
£233 GBP