streak plate
An unglazed piece of porcelain, such as a tile, used to test the characteristic streak of minerals by rubbing the mineral across the tile. Streak plates have a hardness of about 6.5 on the Mohs scale and cannot be used for testing harder minerals.
See streak.
Words nearby streak plate
strayhorn,
strays,
strayve,
streak,
streak culture,
streak plate,
streaking,
streaky,
stream,
stream capture,
stream of consciousness