Hi All.
I am not a Lapidary myself, but some, especially those new to Lapidary work, might find this info useful :-
Heat Sensitivities. VH= Very High sensitivity, H= High, M= Medium, L= low, VL= very low sensitivity,
F = Fairly, so FH is Fairly High and FL is Fairly Low
Amber = VH
Actinolite = VH
Albite = FH
Almandine = FH
Amblygonite = FH
Anhydrite = H
Andalusite =L
Andradite = FH
Anglesite = VH
Apatite = H
Apophyllite = FH
Aragonite = H
Axinite = L
Azurite = H
Baryte = VH
Benitoite = L
Beryl = VL
Beryllonite = FH
Brazilionite = L
Bytownite = FH
Calcite = H
Cassiterite = VL
Celestine = VH
Cerussite = H
Chrysoberyl = VL
Cinnabar = H
Colemanite = L
Cordierite = L
Corundum = L
Crocoite = VH
Cuprite = L
Danburite = VL
Datolite = L
Diamond = VL
Diopside = VL
Dioptase = VL
Dumortierite = L
Enstatite = L
Epidote = FL
Euclase = VL
Euexinite = L
Fluorite = VH
Grossular = FH
Gypsum = L
Hauyne = L
Hematite = VL
Howlite = FL
Idocrase = L
Jadeite = L
Kornerupine = L
Kyanite = L
Labradorite = FH
Lazurite = L
Lazulite = FH
Lepidolite = L
Malachite = H
Marcasite = H
Microcline = FH
Mimetite = H
Oligoclase = FH
Opal = H
Orthoclase var Sanidine = FH
Orthoclase var Adularia, Moonstone = FH
Periclase = L
Peridot = L
Petalite = L
Phenakite = VL
Phosphophyllite = FH
Prehnite = L
Proustite = H
Psilomelane = L
Pyrite = H
Pyrope = FH
Quartz = VL
Rhodochrosite = M
Rhodonite = L
Rutile = L
Samarskite = L
Scheelite = L
Sillimanite = L
Sinhalite = L
Smithsonite = L
Sodalite = L
Spessartine = FH
Sphene = VL
Spinel = VL
Spodumene = FH
Staurolite = L
Stibiotantalite = FH
Sulphur = VH
Sphalerite = L
Topaz = L
Tourmaline = FH
Turquoise = FH
Variscite = FH
Wulfenite = H
Zircon = VL
Zoisite var Tanzanite = FL
Zoisite var Thulite = FL
Bill G
