Many of these are copper containing minerals (copper is toxic to our bodies), but there are also others for instance, rocks that contain Lead or Arsenic, Cadmium, Aluminum, Barium or Mercury.
(There are a lot of other stones and substances that should not be put in water to drink these are just some of them (not kidding!)).
Amazonite - use with caution, the color is a result of traces of copper, which is toxic
Atacamite - poisonous (copper)
Auricalcite - Poisonous (zinc and copper)
Azurite - poisonous (copper)
Boji-stones - unfit - (contains some sulfur) There is some secrecywith regards to it's contents - which means you really should not drink it. (Would you take a pill you did not know the contents of?)
Bronchantite - unfit and poisonous (copper)
Chalcantite (AKA "blue shit") - poisonous (copper)
Chalcopyrite (peacock stone) - poisonous (copper and sulfur)
Cinnabar - poisonous (mercury/quicksilver)
Conicalcite - poisonous (copper)
Copper - poisonous
Crysocolla (AKA Venus-stone) - poisonous (copper)
Cuprite - poisonous (copper)
Dioptase - poisonous (copper)
Gem Silica - poisonous (copper)
Galena/ Galenite - poisonous (almost 90 percent lead)
Garnierite (AKA Genthite/ Falcondoite) - Contains nickel
Halite - will dissolve in water
Hematite - will rust
Lapis Lazuli - poisonous (the pyrite inclusions, that is.)
Magnetite - unfit (Iron, will rust)
Markasite - poisonous (sulfur) (marcasite has the same chemical make-up as pyrite)
Mohawkite - poisonous (copper, ARSENIC etc.) (Keep away from children!)
Psiomelan - poisonous (barium)
Pyrite (AKA fool's gold; Inca-gold) - poisonous (sulphur)
Realgar - poisonous (sulfur and ARSENIC) (Keep away from children!)
Stibnite (has Lead, Antimony)
Smithsonite (AKA Galmei/Zinc spar)- poisonous (zinc (may also contain copper))
Ulexite - The rock will loose its luster when in contact with water
Vanadanite - Poisonous (lead)
Wulfenite - Poisonous (lead and molybdenum)
The general rule is:
Avoid making elixirs and massage oils of any stone/ mineral/ crystals containing any kind of metal (lead, copper etc.). If you don't know the chemical make-up of the kind of rock you have - avoid any blue or green stone, because most of the blue and green stones get their color from its copper contents. (Especially the bright colored ones.) Also avoid any shiny, metal-like stone, because most metals are toxic to humans.
And one last, general warning:
Stones containing arsenic (like Realgar) and mercury (like Cinnabar) should not even be worn nor handled without protective gloves etc. because of its extremely high toxicity. Some stones such as Uranium should be avoided because of Radioactivity. Chocolate colored Tiger's Eye may have been irradiated.
We do not have a list of radioactive stones. I think that in general crystal healing practitioners will be better off not using radioactive stones in their work at all. Certainly you would not make gem elixirs or do laying on of stones with these .You are not likely to come into possession of these stones unwittingly ,unless you live in an area where some of these might be found locally
Radioactive minerals emit various forms of radiation. If proper safeguards and precautions are followed, the dangers from radiation are minimized and even amateur collectors can collect without worry.
Some guidelines for radioactive minerals:
Handle specimens as little as possible; if they are touched, wash hands with soap and water.
Never store specimens, even the smallest of size, in an inhabited room.
Store specimens in a well ventilated area.
Keep all specimens out of children's reach.
Never eat, drink, smoke, or sleep near a radioactive mineral.
Label all radioactive specimens as radioactive.
Don't carry radioactive minerals in your pocket or wear them as jewelry.
Try to keep radioactive minerals in a plastic display case or some other container with a lid.
This helps to control small pieces that may break off during handling.
A boxed radioactive mineral keeps you from directly touching the specimen, which helps to minimize radiation exposure to your skin.
Clean up small particles that may break off of radioactive specimens with soap and water.
If you collect lots of large highly radioactive specimens, then I would consider a lead, lead glass or concrete shielded box for storage, in a well ventilated area.