4. If it cannot be scratched by an ordinary pocket knife, can it be scratched by a piece of quartz? 5. Is it too hard to be scratched by quartz? When the luster, color, and hardness of a mineral have been determined, you may find that several minerals on the charts fit the description. To narrow your choice, you can then test other properties of the mineral. Notice the “remarks” column on the charts. In it, is mentioned anything that is distinctive about the mineral. For more complete mineral identification lists and tables, you can use textbooks, such as _Dana’s Manual of Mineralogy_, revised by C. S. Hurlbut, Jr., or _Mineralogy_, by E. H. Kraus, W. F. Hunt, and L. S. Ramsdell. Key to Mineral Identification Charts If the mineral has a _metallic_ or _submetallic_ luster, and is: Consult Mineral Chart white 1 gray 2 yellow 3 brown 4 black 5 If the mineral has a _nonmetallic_ luster, and is: Consult Mineral Chart white 6 gray 7 yellow 8 brown 9 black 10 green 11 blue 12 red or pink 13 purple or 14 violet colorless 15 Mineral Identification Charts _Chart _Mineral_ _Streak_ _Remarks_ _Hardness_ No._ 1. METALLIC luster, WHITE color A. Does not readily leave mark on paper but can be scratched by ordinary pocket knife Native silver Shiny silver Silver-white 2½-3 white, unless color that tarnished tarnishes to gray, black, or yellowish brown; heavy; can be flattened when hit with hammer 2. METALLIC or SUBMETALLIC luster, GRAY color