Fascinating Facts about Granite

Geological and Scientific Facts about Granite

• Granite is an igneous rock formed from slow-cooling magma beneath the Earth’s surface
• It’s primarily composed of quartz, feldspar and mica, which give it its speckled appearance
• It typically rates 6 to 7 on the Mohs hardness scale, making it one of the hardest natural materials used in construction
• Granite is so hard it can dull knives and damage tools without proper equipment
• It is radioactive in small amounts due to trace amounts of uranium, thorium, and potassium — but not at dangerous levels indoors
• The colour of granite varies widely depending on the mineral content: pink, grey, black, red, green and blue granites exist

Global Production & Trade Facts for Granite

• India, China, and Brazil are the top three granite exporters globally
• India’s granite reserves account for over 1,500 different varieties, with Rajasthan and Tamil Nadu being major hubs
• The UK imports over £100 million worth of granite annually, mainly for countertops, paving and memorials
• Brazil’s exotic granite types, such as Cosmic Black and Blue Bahia, are among the most expensive per square metre globally

Use & Application Facts

• Granite is widely used in:
  • Kitchen worktops and islands
  • Headstones and memorials
  • Public paving and kerbs
  • Bridges and monuments
• It is resistant to heat up to ~250°C, making it ideal for kitchen environments
• Some buildings, like Mount Rushmore, were carved directly from granite mountains
• Granite cladding was used on Royal Bank of Scotland’s HQ, showcasing durability and luxury

Historic & Cultural Facts

• Ancient Egyptians used granite blocks weighing up to 80 tonnes for obelisks and sarcophagi
• The Great Pyramid of Giza’s inner chambers are lined with Aswan granite
• Aberdeen, Scotland, is nicknamed “The Granite City” — many of its Victorian buildings were built from local grey granite
• Granite sculptures last for centuries and are often used in war memorials across the UK

Environmental & Sustainability Facts for Granite

• Granite is a natural, low-maintenance material with an extremely long lifecycle
• It requires less energy to process than manufactured alternatives like engineered quartz
• Reclaimed granite from paving stones or buildings can be reused without significant deterioration
• Quarrying practices have become cleaner, with 95% water recycling in modern facilities

Fun & Weird Facts

• A single square metre of granite countertop can weigh up to 90kg depending on thickness
• The average cost of granite worktops in the UK ranges from £200 to £400 per m², though exotic types exceed £1,000
• NASA uses granite slabs in some test facilities due to its dimensional stability under heat and pressure
• Some high-end kitchens install backlit translucent granite, especially in lighter varieties like White Ice or Colonial Gold