Heliotrope Gemstone Cross Necklace Free USPS Ground Advantage Shipping from California to USA Addresses! The heliotrope gemstone (also known as bloodstone) is an opaque, dark-green fibrous quartz with red spots. The red inclusions are supposed to resemble spots of blood, hence the name bloodstone. There is a legend that says that a bloodstone was first formed when drops of Christ?s blood fell and stained green jasper at the foot of the cross so it is sometimes referred to as ?the martyr?s stone?. The cross charm is one inch. Chains Available- 17.5" plus 2" extender wax rope in black 17.5" plus 2" extender wax rope in brown 17.5" plus 2" extender wax rope in green 20" plus 2" extender black satin silk cord 22" plus 2" extender black satin silk cord 16" 1mm 925 tagged Sterling Silver Plated18" 1mm 925 tagged Sterling Silver Plated20" 1mm 925 tagged Sterling Silver Plated22" 1mm 925 tagged Sterling Silver Plated24" 1mm 925 tagged Sterling Silver Plated (description exceeds maximum possible length)