Petrographic analysis provides detailed mineralogical and textural characterisation of rock, aggregate, concrete, and natural stone materials — delivering the expert geological assessment that engineers, specifiers, and material scientists require for construction suitability, durability evaluation, and reactivity screening. Western Geotechnical Laboratory Services (WGLS) offers a comprehensive suite of accredited petrographic testing services conducted to Australian Standards, ASTM, BS EN, and ISRM methods, including Standard Petrographic Reports to ASTM C295, Secondary Mineral Content at 1800 Point Count to AS 1141.26, Qualitative Petrological Screening for Alkali-Silica Reactivity (AS 1141.65), Petrographic Examination of Hardened Concrete (ASTM C856), Natural Stone Petrographic Examination (BS EN 12407), Classification of Material Weathering to AS 1726, Durable and Non-Durable Mineral Assessment, Shape Analysis — Roundness and Sphericity, and Free Silica and Quartz Content statements to Queensland Main Roads Q188. This breadth of petrographic capability positions WGLS as one of Western Australia’s most comprehensive providers of geological materials assessment for construction, mining, and infrastructure projects.