Handmade Botswana Agate Necklace and Bracelet Set Botswana Agate necklace with crystals and a Selenite pendant is approximately 17” long in total length. The matching Botswana Agate and Crystal bracelet is 7”. Botswana Agate is known to be a comfort stone. It brings positive vibes and has a soothing and calming effect. Selenite is known to provide peace and calm including mental clarity and well-being.