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1.55ct M SI1 Round Natural Diamond

EX • M/SI1 • GIA 6255691222

Certificate GIA 6255691222

Diamond specifications and retailer prices

From £4,590 GBP
As of November 6, 2026
Save £1,876 GBP (29%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £6,466 GBP at Yorxs · As of November 6, 2026
View at Yorxs

About this 1.55ct natural round diamond

This 1.55ct natural round sits in the one-and-a-half to two carat band, graded M colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6255691222. Listed at 2 retailers as of November 6, 2026, with prices from £4,590 to £6,466, a £1,876 spread on the same certified stone. Yorxs lists it at £6,466. 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

1.55
Carat
M
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6255691222
Dimensions7.37 × 7.40 × 4.62 mm
L/W Ratio1.00
Top View
7.37 mm7.40 mm1.55 ctM / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6255691222
Side View
Table 58.0%CrownGirdlePavilionCuletDepth 62.6%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 6
Current: £4,590 GBP|Low: £4,590 GBP|High: £6,502 GBP|Avg: £5,243 GBP
Retailer 1
Retailer 2
Yorxs
November 6, 2026
Retailer 1£4,590 GBP
Retailer 2£4,708 GBP
Yorxs£6,466 GBP

14 data points across 3 retailers

2 retailers£4,590 GBP to £6,466 GBP

B
Cheapest Retailer
-
£4,590 GBP
Most Expensive
C
Yorxs
pm1435 · Nov 6
£6,466 GBP
€8,288 EUR
View
1 more retailer has this diamond
Prices start from £4,590 GBPSave up to £1,876 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
1.55ct Round
£4,590 GBP