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Radiant|Natural|GIA

1.03ct I SI1 Radiant Natural Diamond

GD • I/SI1 • GIA 1377931134

Certificate GIA 1377931134

Diamond specifications and retailer prices

From £1,827 GBP
As of November 5, 2026
Save £980 GBP (35%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £2,807 GBP at Washington Diamond · As of November 6, 2026
View at Washington Diamond

About this 1.03ct natural radiant diamond

This 1.03ct natural radiant sits in the classic one-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 1377931134. Listed at 11 retailers as of November 5, 2026, with prices from £1,827 to £2,807, a £980 spread on the same certified stone. Washington Diamond lists it at £2,807. 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

1.03
Carat
I
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishVery Good
SymmetryGood
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1377931134
Dimensions5.59 × 5.40 × 3.82 mm
L/W Ratio1.04
Culet sizeNone
Top View
5.59 mm5.40 mm1.03 ctI / SI1
OriginNatural
CutGood
PolishVery Good
SymmetryGood
FluorescenceNone
CertificateGIA 1377931134
Side View
Table 63.0%CrownGirdle: THK-THKPavilionCulet: NoneDepth 70.8%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £2,467 GBP|Low: £1,827 GBP|High: £2,807 GBP|Avg: £2,139 GBP|+2.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Washington Diamond
November 6, 2026
Retailer 3£1,827 GBP
Retailer 2£1,838 GBP
Retailer 7£1,954 GBP
Retailer 11£1,978 GBP
Retailer 4£2,054 GBP
Retailer 6£2,093 GBP
Retailer 13£2,216 GBP
Retailer 9£2,219 GBP
Retailer 10£2,219 GBP
Retailer 12£2,233 GBP
Retailer 8£2,294 GBP
Retailer 5£2,389 GBP
Retailer 1£2,467 GBP
Washington Diamond£2,807 GBP

19 data points across 14 retailers

11 retailers£1,827 GBP to £2,807 GBP

B
Cheapest Retailer
-
£1,827 GBP
B
Retailer 2
-
£1,838 GBP
View
B
Retailer 3
-
£1,954 GBP
View
B
Retailer 4
-
£1,978 GBP
View
B
Retailer 5
-
£2,216 GBP
View
B
Retailer 6
-
£2,219 GBP
View
B
Retailer 7
-
£2,219 GBP
View
B
Retailer 8
-
£2,233 GBP
View
B
Retailer 9
-
£2,294 GBP
View
B
Retailer 10
-
£2,467 GBP
View
Most Expensive
C
Washington Diamond
1917994528 · Nov 6
£2,807 GBP
$3,757 USD
View
10 more retailers have this diamond
Prices start from £1,827 GBPSave up to £980 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
1.03ct Radiant
£1,827 GBP