i dont think we need to worry about chromium toxicity. The real dangers are associated tetravalent chromium ions which are not always produced based on the specific chromite mineralogy. For example in India the sukinda chromites are of the bad kind that break down into the tetravalent ions. I think based on the recent work by KWG and what they have reported chromites from the ring of fire do not form these tetravalent smelting products.