Simple ways to extend the longevity of your gemstone jewelry 

Avoid water: Avoid contact with water and do not wear during vigorous activity. Please do not wear your jewels during swimming, hot yoga, sauna/steam room or while showering and bathing .Water and other chemical products (chlorine,detergent,oils,perfumes, etc) could cause damage.
Gemstones and crystals can soak up negative energies and need to be cleansed  to renew the positive energy. How frequently you cleanse your beaded jewels is based entirely on personal preference.
Here are a few ways to cleanse 
Moonlight and Sunlight
Vibrations: Use sound vibrations such as those produced by a singing bowl 
Sage: Burn purifying sage or Palo santo near your mala beads or gemstones 
Selenite: Used for good luck and protection. Also referred to as "liquid light"
Simply place your beads or crystals upon your selenite and charge for up to 24 hours