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Radiant|Natural|GIA

1.00ct K SI2 Radiant Natural Diamond

EX • K/SI2 • GIA 1558392446

Certificate GIA 1558392446

Diamond specifications and retailer prices

From £921 GBP
As of November 7, 2026
Save £566 GBP (38%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £1,992 GBP at NZ Jewellers · As of September 30, 2026
View at NZ Jewellers

About this 1ct natural radiant diamond

This 1ct natural radiant sits in the classic one-carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1558392446. Listed at 8 retailers as of November 7, 2026, with a 61% 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

1.00
Carat
K
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 1558392446
Dimensions6.57 × 4.86 × 3.40 mm
L/W Ratio1.35
Culet sizeNone
Key to symbols
Crystal, Feather, Pinpoint, Indented Natural, Natural
Top View
6.57 mm4.86 mm1.00 ctK / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceMedium
CertificateGIA 1558392446
Side View
Table 67.0%CrownGirdlePavilionCulet: NoneDepth 69.9%

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 7
Current: £1,487 GBP|Low: £817 GBP|High: £1,513 GBP|Avg: £1,014 GBP|-0.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 7, 2026
Retailer 4£817 GBP
Retailer 5£817 GBP
Retailer 6£912 GBP
Retailer 2£921 GBP
Retailer 3£1,138 GBP
Retailer 1£1,487 GBP

44 data points across 6 retailers

8 retailers£921 GBP to £1,487 GBP

Retailer 1
-
£817 GBP
Price last confirmed 30 days ago
Retailer 2
-
£817 GBP
View
Price last confirmed 30 days ago
Retailer 3
-
£848 GBP
View
Price last confirmed 37 days ago
B+
Retailer 4
-
£921 GBP
View
Retailer 5
-
£942 GBP
View
Price last confirmed 39 days ago
B+
Retailer 6
-
£1,138 GBP
View
B
Retailer 7
-
£1,487 GBP
View
Most Expensive
NZ Jewellers
0862b6e4-cb13-42e9-97af-744519664534 · Sep 30
£1,992 GBP
$2,666 USD
View
Price last confirmed 37 days ago
7 more retailers have this diamond
Prices start from £921 GBPSave up to £566 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 Radiant
£921 GBP