What a relief – this Geology category is exactly what you've been looking for, you stone-cold trivia champ. We'll be gneiss and say it: these questions rock!
With geothermal power – from natural hot (140 deg. F) water from an underground reservoir. The water (from Ice Age glaciers trapped by hardened lava from volcanic eruptions) is piped to radiators and hot=-water tanks throughout the city.
Most meteorites contain at least some iron metal (actually an alloy of iron and nickel). You can see the metal shining on a broken surface. Iron meteorites are all metal, stony iron meteorites are about half metal, half stone, and stone meteorites contain small flecks of metal
World’s largest sapphire
The Universe is at least 15 billion years old, but probably not more than 20 billion years old
The amethyst – which gets its name from the Greek amethysto9s – which means “remedy for drunkenness.”
The diameter of the earth at the equator is 7,926.41 miles (12,756.32 kilometers)
Pumice. An igneous (produced by volcanic action) rock having a spongy or frothy texture, and composed largely of glass. It is still sometimes used, as ‘pumice stone’, to scrape the skin when bathing
Molten iron and nickel.
From cooling volcanic lava.