Jasper is often linked to a Persian word for treasurer, by way of the name Caspar, while separately sharing its sound with the banded gemstone prized since antiquity. Both threads point toward something valuable held carefully -- a name suggesting safekeeping as much as worth.
When either Taurus or Libra ascend in women's nativities, and Mars therein, the native will be immodest and unchaste; the same if Capricorn shall ascend. - William Lilly (1602.-1681.)