A) it does not contain silicon- oxygen tetrahedrons.
B) it does not have a definite shape.
C) it does not have a systematic internal organization of its atoms.
D) it is organic in origin.
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A) many synthetic gems are indistinguishable from natural ones except by laboratory analysis.
B) synthetic gems are generally inferior to natural gems.
C) synthetic gems are generally cheaper than natural gems.
D) many of the diamonds used in both industry and in jewelry are synthetic.
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Olivine is an example of a mineral in wh...View Answer
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A) An atom with 7 electrons in its outer shell and the same number of electrons as protons.
B) An atom with 7 electrons in its outer shell and fewer electrons than protons.
C) An atom with 8 electrons in its outer shell and fewer electrons than protons.
D) An atom with 8 electrons in its outer shell and the same number of electrons as protons.
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A) a natural substance that is neither animal nor plant, has a specific composition and structure, and contains one or more silicon- oxygen tetrahedra.
B) a naturally occurring, usually inorganic, solid consisting of chemical elements in specific proportions, whose atoms are arranged in a systematic internal pattern.
C) a naturally occurring crystalline inorganic solid that contains only one element.
D) a solid substance or element that is essential to human nutrition.
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B
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A) proton.
B) molecule.
C) mineral.
D) atom.
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A) aggregates of several crystals.
B) aggregates of one or more minerals.
C) aggregates of one or more naturally occurring solids of definite chemical composition.
D) aggregates of naturally occurring solids of definite crystalline structure.
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All minerals are chemical compounds. The...View Answer
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A) become the atom of a different element.
B) become likely to form an ionic bond with another atom.
C) become electrically positive.
D) become more chemically stable.
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A) the number of protons it has.
B) the number of neutrons and protons together.
C) the number of neutrons it has.
D) the number of electrons it has.
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A
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A) Hardness is dependent on the strength of a mineral's weakest bonds.
B) Hardness refers to how easily or how resistant a mineral is to breakage.
C) Hardness of a mineral is determined by scratching it with a series of other substances of known hardness.
D) Hardness ranges from 1 (the softest) to 10 (the hardest) on a scale called the Mohs Hardness Scale.
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1) Large deposits of halite (table salt)...View Answer
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A) Diamonds are formed as a result of extreme pressure on coal that has been buried to a depth of more than 150 kilometers (90 miles) .
B) Diamond is the world's hardest natural substance.
C) Diamonds are most often found in kimberlite pipes.
D) Only a few kimberlite pipes produce gem- quality diamonds.
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A
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A) Cleavage refers to the tendency of the mineral to break or cleave along distinct planes.
B) Hardness is determined using the Moh's Hardness Scale.
C) Luster refers primarily to whether the mineral appears to shine when its surface is wet.
D) Effervescence refers to the tendency of some minerals to fizz when exposed to acid.
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A) equal bond strength in the crystal structure.
B) durability of the mineral.
C) inequal bond strength in the crystal structure.
D) strength of the bonds in the crystal structure.
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A) They are considered crystals only if they are naturally occurring.
B) On a microscopic level, the crystals of any given mineral possess exactly the same structure even if the crystals are not well formed.
C) They possess an orderly arrangement of ions or atoms in a three- dimensional latticework.
D) In well- formed crystals of a given mineral, angles among the planar surfaces are always the same.
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A) Deposits of calcite form from the slow cooling of molten rock.
B) Deposits of stishovite form from meteorite impacts.
C) Deposits of halite form from the evaporation of saltwater.
D) Deposits of glaucophane form in deep- sea trenches.
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A) Gemstones can form when preexisting rock is subjected to extraordinary pressure and heat.
B) Gemstones can form when molten rock cools and crystallizes deep underground.
C) Gemstones are formed only from very rare minerals.
D) The color in gemstones may result from a few atoms scattered throughout its crystal structure.
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The names of minerals are not based on t...View Answer
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Three ways in which quartz and feldspar ...View Answer
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