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Round|Natural|GIA

1.25ct I SI2 Round Natural Diamond

VG • I/SI2 • GIA 12745808

Certificate GIA 12745808

Diamond specifications and retailer prices

From £2,128 GBP
$2,852 USD
As of October 31, 2026
Save £43 GBP (2%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £2,171 GBP at B2C Jewels · As of October 30, 2026
View at B2C Jewels

About this 1.25ct natural round diamond

This 1.25ct natural round sits in the one-and-a-quarter to one-and-a-half carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a very-good cut grade and certified by GIA 12745808. Listed at 2 retailers as of October 30, 2026, with a relatively tight 2% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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

1.25
Carat
I
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
Polish
Symmetry
Fluorescence
OriginNatural
Grading LabGIA
CertificateGIA 12745808
Dimensions6.85 × 6.93 mm
L/W Ratio1.01
Top View
6.85 mm6.93 mm1.25 ctI / SI2
OriginNatural
CutVery Good
CertificateGIA 12745808
Side View
Table 57.0%CrownGirdlePavilionCuletDepth 62.7%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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Price History

Last verified: Oct 31
Current: £2,171 GBP|Low: £2,128 GBP|High: £2,638 GBP|Avg: £2,273 GBP|-6.1%
B2C Jewels
Retailer 2
September 23, 2026
Retailer 2£2,128 GBP
B2C Jewels£2,171 GBP

6 data points across 2 retailers

2 retailers£2,128 GBP to £2,171 GBP

B+
Cheapest Retailer
-
£2,128 GBP
$2,852 USD
Most Expensive
B
B2C Jewels
21262244 · Oct 30
£2,171 GBP
$2,909 USD
View
1 more retailer has this diamond
Prices start from £2,128 GBPSave up to £43 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+
1.25ct Round
£2,128 GBP