Marble
AntiEtch®
Afghan Black Gold
Afghanistan
MarbleAntiEtch® Candidate
Portoro
Italy (Gulf of La Spezia, Liguria)
Portoro
Photo coming soon
HardnessMedium(3–5 Mohs)
SoftHard
Acid SensitivityHigh Risk — Will Etch
SafeHigh Risk
Stone TypeMarble
Geological NameMarble
OriginItaly (Gulf of La Spezia, Liguria)
ASTM SpecificationASTM C503
ClassificationCalcareous — Consistent
Available FinishesPolished, Honed (Matte), Leathered, Brushed, Tumbled
AntiEtch® FinishesPolished, Honed (Matte) only
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Acid-Sensitive Stone
As a calcareous stone, Portoro will etch (develop dull spots) when exposed to acidic substances like lemon juice, vinegar, wine, tomato sauce, and many household cleaners. MORE AntiEtch® protection can permanently prevent acid etching on polished and honed finishes.
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MORE® AntiEtch® Protection Available
Portoro is a calcareous stone susceptible to acid etching. AntiEtch® provides permanent protection against lemon, vinegar, and other common acids.
Learn More🔬
MB Stone I.D. Kit — Test Your Stone
Not sure what stone you have? This kit includes the tools professionals use to identify stone type, test acid sensitivity, check absorption, and determine the right care products.
Shop Stone I.D. Kit — $139.97Premium Protection · MORE® AntiEtch®
Protect your Portoro
Portoro is a calcareous stone that etches from lemon juice, wine, and coffee. MORE® AntiEtch® stops it.
- Permanent acid-etch protection
- Invisible — keeps the natural finish
- Installed by certified pros
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