By Michaelyn Erickson
Updated Mar 24, 2022
Ancient builders recognized the enduring power of stone. From the limestone blocks of the Egyptian pyramids to the polished marble of the Taj Mahal, architects across millennia have chosen stone for its durability and aesthetic versatility. Modern construction still favors harder varieties like granite, which can withstand the elements far longer than softer rocks.
Granite, an igneous rock abundant worldwide, is primarily composed of feldspar and quartz, with minor amounts of other minerals. Its resilience to weathering and abrasion, combined with the ability to support heavy loads, makes it a favorite for monumental architecture. The legendary Great Pyramid of Giza was originally faced with granite, and the Washington Monument in Washington, D.C. is largely built from this durable stone. According to the Wesleyan University Geology Department, granite has been quarried in the Americas since the 19th century and remains a standard choice for monuments that must endure for centuries.
Marble, the metamorphosed cousin of limestone, has long been prized by Greek and Roman architects for its range of colors and intricate veining. The iconic Taj Mahal in India showcases polished white marble, while legend tells of Shah Jahan’s intent to build a twin mausoleum across the river using black marble. The purity of the parent limestone dictates the whiteness of the marble; the metamorphic process re‑crystallizes minerals into a denser, more robust stone.
Limestone, a sedimentary rock formed from the fossilized remains of marine organisms, has given rise to some of humanity’s oldest monuments. The pyramids at Giza were constructed from limestone blocks, later faced with granite for added protection. The Roman Colosseum also employed limestone. While limestone is prized for its ease of cutting and carving, it is vulnerable to weathering when exposed to water and wind, which explains why many ancient structures paired it with harder casing stones.
Sandstone, another sedimentary rock composed of cemented sand grains, is characterized by grain sizes between 0.1 mm and 2.0 mm. The stone typically consists of quartz and feldspar grains bound by calcite, gypsum, or clay. Angkor Wat in Thailand is entirely built of sandstone, and its construction so influenced later projects that the term “Angkor Wat Style” became synonymous with sandstone architecture.
