Hoffman Materials' planar quartz blanks are manufactured from pure Z quartz, insuring good, long term stability and high Q. All standard cuts are available, including 0o X, 0o Y, 0o Z, AT, BT, CT, DT, FC, IT, and SC. All other cuts including low frequency are possible. Crystal blanks can be made of swept or un-swept quartz with polished or unpolished surfaces and with or without beveled edges. Round crystal blanks can also be purchased with reference flats located at specific locations.