Gemstones questions This is a list of recently added questions about gemstones. Play gemstones quiz and see all the questions. 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% azuriteazurite1076malachitemalachite5726cinnabarcinnabar436turquoiseturquoise2213minerals riddles » What's the origin of the word "turquoise"?Turkey as a country. The name Turquoise was established in the seventeenth century and came from the name of Turkey (turquois is French for "Turkish"), because the mineral was first brought to Europe from Turkey. Acient Romans called this rock Kalalit.Created by: GabrielBaranvery hard 34% Turku City in FinlandTurku City in Finland703Turkey as a countryTurkey as a country1441Turkusy, fake regionTurkusy, fake region979Persian tortoisePersian tortoise1036Turkey riddles » How can you cut a diamond?Using a diamond. Diamond is a hardest substance in the world and hence as a very strong bonding between the atoms. hence it can be cut only by using a diamond Created by: Shruthi Srinivasaneasy 79% using a knifeusing a knife173using a diamondusing a diamond10123using goldusing gold420using a gasusing a gas1967materials riddles » What is the Greek name for amber?Elektron. Words like "electricity" come directly from the name of amber. Already the ancient Greeks noticed that this stone has a certain mysterious property: when rubbed with fur, it begins to attract particles of dust...Created by: Marta_Smolarekhard 41% particlonparticlon999elektronelektron3127amberionamberion2151atomiosatomios1238technology riddles » 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 Kołodziejczykhard 47% TopazTopaz3045RubyRuby1388BerylBeryl5233TalcTalc1266names riddles » 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 Kołodziejczykaverage 61% redred843greengreen1460blueblue5034purplepurple866colors riddles » 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 Kołodziejczykaverage 65% redred721greengreen5317blueblue1688purplepurple356colors riddles » Where are emeralds found the most?In Colombia. Colombia is by far the world's largest producer of emeralds, constituting 50–95% of the world production. The Colombian emeralds are also the purest. The emerald trade is at the center of funding of ongoing civil conflict in Colombia, second to drug trade.Created by: globalquiz.orghard 42% in South Africain South Africa4586in Colombiain Colombia5254in Siberiain Siberia1272in Argentinain Argentina1258natural resources riddles » 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 Stillerhard 55% near the volcanonear the volcano6443in the coal minein the coal mine3712in the silver minein the silver mine820at the beachat the beach606nature riddles » What was used as a unit of mass in the classical times?Carob seed. Carat, a unit of mass equal to 200 mg, is derived from a carob seed (Greek kerátion). People commonly believed that the seeds have unusually low variability in mass. Modern research denied this claim.Created by: globalquiz.orgvery hard 35% carob seedcarob seed2528a drop of leada drop of lead856handful of sandhandful of sand2732swallow's eggswallow's egg1103units riddles » Play minerals quiz and see all the questions.