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Frequently, slabs for flooring and cladding are installed with polished finishing in outdoor environments for technical and ornamental purposes in cultural heritage sites and modern civil architecture. Compared to any other finishing, glossy surfaces are rather vulnerable to wear, particularly when they interact with slightly acidic rainwater. Several hydrophobic treatments are applied to prevent this damage by preventing contact between rain and stone; such treatments are efficient but sometimes non-durable. Stakeholders and conservation scientists need better methods to anticipate the future behaviour of this building material and hydrophobic solutions. Complying with this demand, a comparison is made between outdoor natural ageing and artificial weathering, reproduced by UVA radiation, moisture and spray accelerated weathering. Artificial weathering is applied to predict the behaviour of stones over time in the real environment. Data obtained through the measurement of gloss and colour parameters, the detection of micro-textures through SEM, and the calculation of micro-roughness using a digital rugosimeter demonstrate that weakly acidic rainwater is the main cause of superficial decay of stone finishing over just six months of outdoor exposure. This period corresponds to 7\u201314 days of artificial weathering. Furthermore, the loss of efficiency and durability of the hydrophobic coatings is detected by measuring the static contact angle. This highlights that even if a protective treatment was proficient, it could easily deteriorate in normal weathering conditions if applied on polished, low-porosity stone. Additionally, water vapour permeability indicates variations of regular vapour transmission through the stones due to ageing. The first solution to threats is the prevention of pathologies, including aesthetic ones. A careful choice of the most suitable lithotype finish and an environmental study represent an existing solution to the problem. It must be highlighted that aesthetic requirements should not be prioritised to detriment of the technical requirements of architectural quality, performance, durability, and safety.<\/jats:p>","DOI":"10.3390\/heritage6060244","type":"journal-article","created":{"date-parts":[[2023,6,5]],"date-time":"2023-06-05T04:01:47Z","timestamp":1685937707000},"page":"4593-4617","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":15,"title":["Stone Endurance: A Comparative Analysis of Natural and Artificial Weathering on Stone Longevity"],"prefix":"10.3390","volume":"6","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2179-130X","authenticated-orcid":false,"given":"Carla","family":"Lisci","sequence":"first","affiliation":[{"name":"HERCULES Laboratory and IN2PAST, Associate Laboratory for Research and Innovation in Heritage, Arts, Sustainability and Territory, Institute for Advanced Studies and Research, University of \u00c9vora, Largo Marqu\u00eas de Marialva 8, 7000-809 \u00c9vora, Portugal"},{"name":"Geosciences Department, School of Sciences and Technology, University of \u00c9vora, Rua Rom\u00e3o Ramalho 59, 7000-671 \u00c9vora, Portugal"}]},{"given":"Fabio","family":"Sitzia","sequence":"additional","affiliation":[{"name":"HERCULES Laboratory and IN2PAST, Associate Laboratory for Research and Innovation in Heritage, Arts, Sustainability and Territory, Institute for Advanced Studies and Research, University of \u00c9vora, Largo Marqu\u00eas de Marialva 8, 7000-809 \u00c9vora, Portugal"},{"name":"Geosciences Department, School of Sciences and Technology, University of \u00c9vora, Rua Rom\u00e3o Ramalho 59, 7000-671 \u00c9vora, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1457-1627","authenticated-orcid":false,"given":"Vera","family":"Pires","sequence":"additional","affiliation":[{"name":"HERCULES Laboratory and IN2PAST, Associate Laboratory for Research and Innovation in Heritage, Arts, Sustainability and Territory, Institute for Advanced Studies and Research, University of \u00c9vora, Largo Marqu\u00eas de Marialva 8, 7000-809 \u00c9vora, Portugal"},{"name":"LEM Laborat\u00f3rio de Ensaios Mec\u00e2nicos, da Universidade de \u00c9vora, R. Rom\u00e3o Ramalho 59, 7000-671 \u00c9vora, Portugal"}]},{"given":"Marco","family":"Aniceto","sequence":"additional","affiliation":[{"name":"SOLANCIS, Sociedade Exploradora de Pedreiras, S.A. Rua da Sindocal 22, Casal do Carvalho, Apartado 90, 2475-016 Benedita, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0103-3448","authenticated-orcid":false,"given":"Jos\u00e9","family":"Mir\u00e3o","sequence":"additional","affiliation":[{"name":"HERCULES Laboratory and IN2PAST, Associate Laboratory for Research and Innovation in Heritage, Arts, Sustainability and Territory, Institute for Advanced Studies and Research, University of \u00c9vora, Largo Marqu\u00eas de Marialva 8, 7000-809 \u00c9vora, Portugal"},{"name":"Geosciences Department, School of Sciences and Technology, University of \u00c9vora, Rua Rom\u00e3o Ramalho 59, 7000-671 \u00c9vora, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2023,6,2]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"6475","DOI":"10.1007\/s10853-012-6349-7","article-title":"Accelerated climate ageing of building materials, components and structures in the laboratory","volume":"47","author":"Jelle","year":"2012","journal-title":"J. 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