| Name | Heliotrope (Bloodstone) |
| Class | Silicates |
| Category | Microcrystalline quartz |
| Crystal system | Trigonal |
| Chemical composition | Silicon dioxide (SiO₂) with inclusions of hematite or red jasper |
| Hardness (Mohs scale) | 6.5 to 7 |
| Transparency | Opaque |
| Geographical origin | India, Brazil, Australia, China, United States |






















































































































































































































