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Radiant|Natural|GIA

1.51ct K SI1 Radiant Natural Diamond

VG • K/SI1 • GIA 2225812998

Certificate GIA 2225812998

Diamond specifications and retailer prices

From £3,989 GBP
$5,339 USD
As of November 5, 2026
3 retailers carry this diamond
Most expensive: £3,989 GBP at Blue Nile
View at Blue Nile

About this 1.51ct natural radiant diamond

This 1.51ct natural radiant sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 2225812998. Listed at 3 retailers as of November 5, 2026. 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

1.51
Carat
K
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2225812998
Dimensions8.44 × 5.35 × 3.67 mm
L/W Ratio1.58
Culet sizeNone
Top View
8.44 mm5.35 mm1.51 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2225812998
Side View
Table 71.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 68.6%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 5
Current: £3,989 GBP|Low: £3,329 GBP|High: £4,616 GBP|Avg: £3,740 GBP
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
September 26, 2026
Retailer 2£3,329 GBP
Retailer 5£3,362 GBP
Retailer 3£3,528 GBP
Blue Nile£3,989 GBP
Retailer 4£4,616 GBP

2 data points across 5 retailers

3 retailers

Retailer 1
-
£3,329 GBP
Price last confirmed 15 days ago
Retailer 2
-
£3,528 GBP
View
Price last confirmed 17 days ago
Most Expensive
B
Blue Nile
17426978 · Nov 5
£3,989 GBP
$5,339 USD
View
2 more retailers have this diamond

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
1.51ct Radiant
£3,989 GBP