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Radiant|Natural|GIA

1.05ct G SI1 Radiant Natural Diamond

ID • G/SI1 • GIA 2557478773

Certificate GIA 2557478773

Diamond specifications and retailer prices

From £1,376 GBP
$1,847 USD
As of November 1, 2026
Save £280 GBP (17%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £1,657 GBP at Blue Nile · As of October 31, 2026
View at Blue Nile

About this 1.05ct natural radiant diamond

This 1.05ct natural radiant sits in the classic one-carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2557478773. Listed at 6 retailers as of October 31, 2026, with prices from £1,376 to £1,657, a £280 spread on the same certified stone. Blue Nile lists it at £1,657. 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

1.05
Carat
G
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2557478773
Dimensions6.84 × 4.96 × 3.34 mm
L/W Ratio1.38
Culet sizeNone
Key to symbols
Crystal, Cloud, Needle
Top View
6.84 mm4.96 mm1.05 ctG / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2557478773
Side View
Table 65.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 67.4%

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 1
Current: £1,657 GBP|Low: £1,197 GBP|High: £1,762 GBP|Avg: £1,524 GBP|-6.0%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 17, 2026
Retailer 2£1,376 GBP
Retailer 4£1,386 GBP
Retailer 5£1,399 GBP
Retailer 3£1,580 GBP
Retailer 6£1,631 GBP
Blue Nile£1,657 GBP

10 data points across 6 retailers

6 retailers£1,376 GBP to £1,657 GBP

A
Cheapest Retailer
-
£1,376 GBP
$1,847 USD
A
Retailer 2
-
£1,386 GBP
$1,860 USD
View
Final sale: no returns
A
Retailer 3
-
£1,399 GBP
MYR 7,649 MYR
View
A
Retailer 4
-
£1,580 GBP
SGD 2,865 SGD
View
A
Retailer 5
-
£1,631 GBP
A$3,368 AUD
View
Most Expensive
A
Blue Nile
29370756 · Oct 31
£1,657 GBP
$2,223 USD
View
5 more retailers have this diamond
Prices start from £1,376 GBPSave up to £280 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
1.05ct Radiant
£1,376 GBP