Eosc 118 - Study guides, Class notes & Summaries

EOSC 118 EXAM QUESTIONS AND ANSWERS ALL CORRECT What is Spodumene? - Answer- Spodumene is a lithium (Li)-bearing aluminosilicate mineral and is the base mineral for the gemstone varieties kunzite and hiddenite. Spodumene is typically colourless, while light pink kunzite is uncommon and vivid green hiddenite is considerably rare. How is spodumene distinguished? - Answer- Spodumene forms prismatic crystals with roughly square or rectangular outlines and two distinct cleavages that intersect a...

EOSC 118 EXAM WITH COMPLETE SOLUTIONS 100% CORRECT Methods for synthetically producing diamonds - Answer- Carbon Vapour Deposition (CVD), High Pressure High Temperature growth (HPHT) HPHT growth - Answer- seed diamonds placed in chamber, flooded with molten carbon and catalysts, imitates growth of natural diamonds, 1500 degrees C and 60,000 atm pressure Carbon Vapour Deposition (CVD) - Answer- flow H and CH4 gas through chamber with plasma flame in flow path, low pressure, uses diamond...

EOSC 118 EXAM SET QUESTIONS AND CORRECT REVISED ANSWERS 100% VERIFIED 8 most abundant elements in the Earth's crust from most, to least abundant: - Answer- Oxygen, O 46.0 Silicon, Si 27.5 Aluminum, Al 8.0 Iron, Fe 5.0 Calcium, Ca 4.0 Sodium, Na 3.0 Potassium, K 3.0 Magnesium, M 2.0 Native elements - Answer- -When elements occur by themselves in rock (i.e., not chemically bonded to other elements) -20 elements can occur in their native state (not including gases); all are metal...

EOSC 118 MODULE B PRECIOUS GEMSTONES EXAM 2025 WITH 100% ACCURATE SOLUTIONS

EOSC 118 FINAL EXAM QUESTIONS AND ANSWERS GUARANTEED PASS 2024 LATEST UPDATE What are common treatments for corundum? - Answer- Heating to improve clarity, diffusion treatment to add colour. Usually done before it's cut. Can corundum be produced synthetically? - Answer- Taking the necessary oxide components in powdered form, melting them together in a container and a seed crystal is lowered in and slowly removed causing it to be continually grown below it. How does corundum form in ...

EOSC 118 TEST QUESTIONS AND ANSWERS ALL CORRECT Where are the finest qualities of rubies found - Answer- Myanmar (the Mogok Stone Tract of Burma) What is considered the best colour of rubies - Answer- pigeon's blood red Where are the common geographic origins for diamonds, rubies, and emeralds ? - Answer- diamonds - South Africa emeralds - Columbia (formally Egypt) rubies - Myanmar What are the primary uses for PGMs - Answer- electronics, jewellery, and autocatalysts Wh...

EOSC 118 Final Test Questions with 100% Correct Answers What is similar about the geological setting in which diamonds and xenocrystic corundum are formed? - Answer- Both are formed at great depths in the Earth, and brought to the surface by magma of a different composition In four pegmatite classes, which one is most likely to contain gemstones? - Answer- Rare-element Where are the famous districts of gem bearing pegmatites? - Answer- Us Italy Pakistan What condition is critica...

EOSC 118 (UP TO 16) Correctly answered to pass