Match the specific physical property with the description.  Choose the best answer.
______1 chatoyancy a. closely spaced fractures can cause a changing or play of colors as  mineral is rotated
______2.thermoluminescence b. needlelike crystals
______3.ductile c. inability of a mineral to break in a consistent fashion
______4.iridescence d. small spherical grains of mineral calcite caused
               by MnO2 dispersions  
e. mineral inclusions
______6.tenacity f. silky or wavy appearance on the surface of minerals
______7.fracture g. emission of light when bombarded with x-rays or UV light
______8.acicular h. color caused by presence of small concentrations of element (s)
______9.specific gravity i. emission of light when mineral is heated below "red hot ' temperature
_____10.chromophores j. kidney shaped mineral masses
_____11.cleavage k. a smooth curved breakage
_____12.oolitic l. a mineral can be drawn into wire
_____13.fluorescence m. ability of a mineral to break in a consistent way .
_____14.reniform n. related to the kinds of atoms comprising the mineral
_____15.concoidal o. cohesiveness of a mineral

     Match the physical property with an example of one or more minerals
_____1. chatoyancy a. quartz and diamonds
_____2. fluorescence b. labradorite or opal
_____3. ductile c. apatite
_____4. iridescence d. quartz and tourmaline
_____5. asterism e. Fe, Mn, Ni, Cu
_____6. vitreous f.  emerald
_____7. 2 directions of
g. rubies and sapphires
_____8. piezoelectricity h. hematite
_____9. 5 on hardness scale i.  malachite
____10. chromophores j. satin spar gypsum and tiger's eye quartz
____11. Cr+3 chromophore
            causing a green color
k. amethyst
____12. oolitic l. cordierite
____13. Cu composition
            causing a green color
m. some examples of fluorite and scheelite
____14. Fe in quartz n. gold and native Cu
____15. dichroism o. feldspars, augite and hornblende

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