brass }

brass is a yellow colored metallic alloy made of copper + zinc. 

maintenance }

to keep your brass items beautiful, and your skin clear of possible irritation make sure to : always wear brass jewelry on top of your clothes. don't wear it directly on to your skin, make sure to sleep, shower, swim, perform household chores, sport without them. 

corrosion }

brass will eventually change from yellow to brown over time. if you don't like this antique patina for your item you could make it shiny + new again with a polishing cloth.  

hardness }

2,5 - 3 on the scale of mohs. glossy becomes a bit matte, matte becomes a bit glossy over time.