Minerals questions This is a list of recently added questions about minerals. Play minerals quiz and see all the questions. What used to be mined at the site from the picture above?Diamonds. The picture shows the Big Hole, an open-pit and underground diamond mine in Kimberley, South Africa. It is about 215 metres deep with a surface area of 17 hectares and it's claimed to be the largest hole excavated by hand, although this claim is disputed.Created by: Ninjaihard 57% goldgold46diamondsdiamonds153petroleumpetroleum27coalcoal41industry riddles » What is "fool's gold" made of ? Pyrite. The mineral pyrite, or iron pyrite, also known as fool's gold. Pyrite is considered the most common of the sulfide minerals. Pyrite's metallic luster and pale brass-yellow hue give it a superficial resemblance to gold, hence the well-known nickname of fool's gold . Pyrite is considered the most common of the sulfide minerals.Created by: Tschuka easy 70% cinnabarcinnabar14pyritepyrite108seleniteselenite16pyrrhotitepyrrhotite15gold riddles » The world’s largest silver producer is...?Mexico, the world's biggest silver producing country, and Poland host three each of the world's 10 biggest silver mines. China, Peru, Bolivia andTurkey host the remaining four. Created by: Tschuka very hard 31% ChinaChina32RussiaRussia21MexicoMexico51ChileChile59mines riddles » The largest producer of uranium ore in the world is ?Kazakhstan is the largest producer of uranium in the world - as much as 37% of global extraction.Created by: Tschuka hard 48% RussiaRussia50North KoreaNorth Korea18KazakhstanKazakhstan97ChinaChina35geography riddles » What is mined in the mine at Chuquicamata ? (Chile)Copper ore. Chuquicamata, one of the largest open pit copper mines and the second deepest open-pit mine in the world, is located 1,650km north of Santiago, Chile.Created by: Tschuka hard 59% iron oreiron ore23copper orecopper ore162silversilver58goldgold31South America riddles » Which of the minerals below shows pleochroism?Alexandrite. Pleochroism is an optical phenomenon in which a substance has different colors when observed at different angles, especially with polarized light. Alexandrite appears greenish in daylight where the full spectrum of visible light is present, and reddish in incandescent light which emits less green and blue spectrum.Created by: Ninjaihard 46% aquamarineaquamarine46bixbitebixbite24alexandritealexandrite98topaztopaz42geology riddles » The only color which sapphire cannot be is ...Red. The only color which sapphire cannot be is red – as red colored corundum is called ruby, another corundum variety. Pink colored corundum may be either classified as ruby or sapphire depending on locale.Created by: Tschuka very hard 39% orangeorange49yellowyellow33redred92blackblack57 What gemstone is this?Malachite is a copper carbonate hydroxide mineral, with the formula Cu2CO3(OH)2. This opaque, green banded mineral crystallizes in the monoclinic crystal system, and most often forms botryoidal, fibrous, or stalagmitic masses, in fractures and spaces, deep underground.Created by: Ninjaiaverage 60% azuriteazurite1035malachitemalachite5445cinnabarcinnabar418turquoiseturquoise2138gemstones riddles » Sapphire is a blue variety:Of corundum. Sapphire is a gemstone, a variety of the mineral corundum, an aluminium. It is typically blue in color, but natural "fancy" sapphires also occur in yellow, purple, orange, and green colors. Pink colored corundum may be either classified as ruby or sapphire depending on locale.Created by: Tschuka very hard 32% of agateof agate250of chalcedonyof chalcedony168of corundumof corundum267of jasperof jasper128geology riddles » According to the Mohs hardness scale, which of the given raw materials is the hardest?Orthoclase. In the order of hardness: calcite (CaCO3), fluorite (CaF2), apatite (Ca5 (PO4) 3 (OH-, Cl-, F-), and orthoclase (KAlSi3O8).Created by: Tschuka very hard 34% calcitecalcite167orthoclaseorthoclase157fluoritefluorite41apatiteapatite84 Play minerals quiz and see all the questions.