10 questionsð¬ð§English
ð Rocks, Gems & Minerals
Dazzling diamonds, fool's gold and rocks as old as the Earth â dig in and see what you can unearth!
Make it your own private quiz and change anything you like
Questions
Which type of rock forms when molten magma or lava cools and hardens?
Metamorphic
Fossil
Sedimentary
Igneous
20s
Diamond is made almost entirely of which chemical element?
Carbon
Oxygen
Calcium
Silicon
20s
The shiny yellow mineral nicknamed 'fool's gold' is properly called:
Calcite
Pyrite
Mica
Galena
20s
Which mineral is the softest, with a hardness of 1 on the Mohs scale?
Calcite
Quartz
Gypsum
Talc
20s
Gold that is described as '24 carat' is:
Half gold, half silver
Pure gold
Gold-plated steel
About 75% gold
20s
Marble is a metamorphic rock. Which rock is changed by heat and pressure to form it?
Limestone
Basalt
Sandstone
Granite
30s
Uluru, the giant red rock in central Australia, is made mainly of which type of rock?
Sandstone
Granite
Basalt
Marble
30s
Rubies and sapphires are both gem varieties of which mineral?
Topaz
Corundum
Quartz
Beryl
30s
Amethyst, the February birthstone, is a purple variety of which common mineral?
Fluorite
Corundum
Feldspar
Quartz
30s
The Great Star of Africa, the largest stone cut from the Cullinan diamond, is set in which Crown Jewel?
Sovereign's Sceptre with Cross
St Edward's Crown
Imperial State Crown
Sovereign's Orb
30s