Minerals questions This is a list of recently added questions about minerals. Play minerals quiz and see all the questions. What mineral is a heliodor gemstone a variety of?Beryl. Heliodor is a yellow transparent variety of beryllium (emerald and aquamarine are also varieties of beryllium). The name derives from the Greek word helios = sun (sun-god) and doron = gift ("gift of the Sun").Created by: Paweł Kołodziejczykgemstones riddles »hard 50% TopazTopaz1212RubyRuby628BerylBeryl2450TalcTalc603 Which of the following is not an allotropic variety of coal?Anthracite. An allotropy is a phenomenon of appearing, in the same state of aggregation, of all sorts varieties of the same chemical element, differing in physical properties and chemical. Coal is appearing mainly in the form of diamond, graphite, fullerene and graphene. Anthracite is simply a variety of the hard bituminous coal.Created by: Paweł Kołodziejczykchemistry riddles »hard 42% diamonddiamond359graphitegraphite373fullerenefullerene1155anthraciteanthracite1405 What colour is sapphire colour a shade of?Blue. The name of the colour comes from sapphire, a blue variety of the corundum.Created by: Paweł Kołodziejczykcolors riddles »average 60% redred332greengreen777blueblue2339purplepurple404 What colour is emerald colour a shade of?Green. The name derives from the Greek smaragdos (as well as Lat. smaragdus - green). It refers to the characteristic colour of emerald stones.Created by: Paweł Kołodziejczykcolors riddles »average 60% redred388greengreen2311blueblue915purplepurple194 What rock is this?Granite is a type of felsic intrusive igneous rock. It is granular and phaneritic in texture. The rock mainly consist of quartz, feldspar, mica, and amphibole minerals.Created by: KYRTAPSgeology riddles »very easy 80% gneissgneiss800granitegranite8782halitehalite475basaltbasalt895 Where are such formations usually found?In deserts. Desert rose is the colloquial name given to rosette formations of crystal clusters of gypsum or baryte which contain abundant included sand grains. Desert roses occur when the crystals form in arid sandy conditions, such as the evaporation of a shallow salt basin.Created by: Carlos Saltodeserts of North Africa riddles »easy 74% in cavesin caves1162in coal minesin coal mines452in desertsin deserts10793in extinct volcanoesin extinct volcanoes2037 Where do you have the best chance to find a natural diamond?Near the volcano. It is sometimes mistakenly believed that diamonds are made from coals. High pressure and heat is required for the formation of diamonds from carbons but these carbons are not the ones that form coal. Diamonds are formed deep under the surface and are brought up during outbreaks of volcanoes.Created by: Monica Stillernature riddles »hard 54% near the volcanonear the volcano3552in the coal minein the coal mine2056in the silver minein the silver mine508at the beachat the beach368 What was graphite believed to be a form of?Lead. When large deposit of graphite was found in the 16th century in England, it was thought to be a form of lead. In many languages, the word for pencil literally means lead pen. (German Bleistift, Polish ołówek, Arabic قلم رصاص) Created by: Kasiawriting riddles »average 64% leadlead10848mercurymercury1256ironiron1948chalkchalk2680 Which type of a coal is the youngest?Lignite (brown coal). Coal forms when the dead plant matter is converted into peat, which in turn is converted into lignite, then sub-bituminous coal, then bituminous coal, and lastly anthracite.Created by: Kasianatural resources riddles »hard 57% lignite (brown coal)lignite (brown coal)4161graphitegraphite1018bituminous coalbituminous coal866anthraciteanthracite1144 Which country is the global leader in aluminium production?China. People's Republic of China is the top producer of aluminium with almost a one-fifth world share. It heavily outranks other countries, producing five times as much as the second place holder - Russia.Created by: Kasiacountry records riddles »hard 51% ChinaChina6813CanadaCanada2403United StatesUnited States1517RussiaRussia2458 Play geology quiz and see all the questions.