Timeless Beauty: Enduring Elegance in Sterling Septarian Rhyolite The Septarian Rhyolite is unequivocally a fascinating and lovely addendum to any collection. It can be used as jewelry or accessories and is a very beneficial talisman. Septarian Rhyolite is derived from the Latin term "Spetem," which means seven because it appears in seven different forms. The particular gemstone is admirable due to the amount it looks like a specific design.