Heliotrope is a quartz variety also known as bloodstone due to small, bright red spots that sometimes occur in it.
It is mostly dark shades of jasper or chalcedony with spots of red iron oxide inclusions.
The name heliotrope is Greek for "sun to turn." Pliny the Elder, first-century naturalist, described the reason for this name, "when the stone is dropped into a vessel of water and bright sunshine falls upon it, in reflecting the sunlight it changes it into the colour of blood.
Your heliotrope could be one of the pieces with red spots.