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 49% TopazTopaz1082RubyRuby551BerylBeryl2133TalcTalc514 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% diamonddiamond331graphitegraphite336fullerenefullerene1041anthraciteanthracite1266 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% redred312greengreen689blueblue2133purplepurple365 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% redred356greengreen2053blueblue813purplepurple173 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 »easy 79% gneissgneiss751granitegranite8087halitehalite438basaltbasalt837 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 caves1081in coal minesin coal mines417in desertsin deserts9788in extinct volcanoesin extinct volcanoes1882 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 volcano3280in the coal minein the coal mine1933in the silver minein the silver mine477at the beachat the beach351 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% leadlead10187mercurymercury1177ironiron1826chalkchalk2540 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)3857graphitegraphite968bituminous coalbituminous coal823anthraciteanthracite1070 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% ChinaChina6267CanadaCanada2261United StatesUnited States1434RussiaRussia2273 Play geology quiz and see all the questions.