GIA Colored Stone Final Exam Test
Are not minerals
amber
amber
rock
garnet
organic
demantoid
the US
chemical ele-
ment
emerald
mineral
minerals
rare
gem species
independent
miners using
small-scale
mining methods.
By what date had Kokichi Mikimoto begun culturing whole
pearls
...
GIA Colored Stone Final Exam Test 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 1908 Are not minerals amber amber rock garnet organic demantoid the US chemical ele- ment emerald mineral minerals rare gem species independent miners using small -scale mining methods. By what date had Kokichi Mikimoto begun culturing whole pearls Synthetic gem materials which of the following is an organic gem which of the following is amorphous a natural material that's made up of a mass of one or more kinds of mineral crystals is what group does alamandine belong to A gem produced by, or derived from, a living organism is which of the following is a gem variety the world's largest gem -consuming market is a substance that consists of atoms of only one kind is a Media attention in the 1990s regarding its treatment re- duced consumer confidence in a natural, inorganic substance with a characteristic chem - ical composition and usual crystal structure is a most gems are To be a gem, a mineral must be beautiful, durable, and a broad gem category based on chemical composition and crystal structure is called a Many colored stones are mined by GIA Colored Stone Final Exam Test 17. 18. 19. 20. metamorphic secondary red beryl unable to with- Rocks altered by heat and pressure beneath Earth's sur- face are Which type of deposit is usually the most profitable for colored stone mining? Which gem can crystallize in volcanic rock from gasses released by magma? Emeralds are rarely found in placer deposits because stand much abra - they're sion 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. placers eluvial beryllium, boron, and lithium metamorphic process placer deposits primary deposit Ouro Preto, Brazil marble tanzanite continental crust Which is a workable alluvial deposit of gem minerals with economic potential? Which is a deposit where gems eroded from the source rock and remained in place nearby? from granite, pegmatite gems get exotic elements like Myanmar's famous Mogok ruby deposits were formed by most of the gems in tanzania's umba river valley are formed in A deposit where gems are found in the rock that where they formed is called Which is a key locality for hydrothermal gems? Heat and pressure transform limestone into which gem form by metamophosis Most gemstones form in the 31. 32. 33. 34. 35. 36. 37. 38. 39. 40. 41. 42. 43. 44. 45. 46. tourmaline and beryl in peg - matites density liquid and a gas polysynthetic chromium basic identity contact twinning small topaz Chalcedony and turquoise trace elements flattened crys- tals twinned crystals inclusions cryptocrystalline iron and titanium kunzite is most often associated with how heavy an object is in relation to its size A two-phase inclusion is a cavity in a gem that's typically filled with a which type of twinning is caused by environmental change after a gem forms which element caused red in ruby and green in emerald A unit cell defines a mineral's which type of twinning looks as if two crystal halves are mirror images crystals that grow in a flux that is highly saturated with the necessary elements tend to be - which is classified in the orthorhombic crystal system Which gems are cryptocrystalline aggregates? Atoms in a gem that aren't part of its essential chemical composition are called Many fashioned rubies have shallow proportions because they're cut from Rough spinel often occurs as Needles of actinolite found in emerald are classified as which aggregates crystals are visible only under very high magnification the trace elements that cause corundum's blue are
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