Lapis Amianthus
Lapis Amianthus AsbestosLinum Asbestium Metallotheca Vaticana Opus Posthuman, 1719 Crocidolite (blue asbestos),(Photo by Raimond Spekking) (Wikimedia) It was rarely used, and only externally in plasters. However, it overlaps Actinolite, used in TCM.