a) Actinolite specimen with well defined prismatic crystals. The green colour is due to the iron content. This is an example of the asbesti form of the mineral. Probably traded from Quebec. b) Tremolite specimen with well defined prismatic crystals. The white colour is due to the lack of iron and p…
a) Actinolite specimen with well defined prismatic crystals. The green colour is due to the iron content. This is an example of the asbesti form of the mineral. Probably traded from Quebec. b) Tremolite specimen with well defined prismatic crystals. The white colour is due to the lack of iron and presence of magnesium.
Fossilized ammonite (Maclurites) on silty limestone. Calcite crystals growing on the shell, cavity has not been completely filled in. From the Ordovician period.
Fossilized ammonite (Maclurites) on silty limestone. Calcite crystals growing on the shell, cavity has not been completely filled in. From the Ordovician period.
1. The nature of the crystalline state -- 2. Methods of projection -- 3. The description of crystals -- 4. A general study of the seven crystal systems -- 5. Goniometry -- 6. The thirty-two classes -- 7. Parallel growth and composite crystals -- 8. Some mathematical relationships -- 9. Crystal drawings -- 10. The symmetry of internal structure -- 11. Space groups -- 12. Diffraction of x-rays by crystals -- 13. Crystal habit
File consists of author's copies of multiple editions of Ben Gadd's book, Handbook of the Canadian Rockies. Editions in file are annotated with notes and corrections by the author.
File consists of author's copies of multiple editions of Ben Gadd's book, Handbook of the Canadian Rockies. Editions in file are annotated with notes and corrections by the author.