1. DICHOTOMIC KEY ON COMMON MINERAL IDENTIFICATION © I.E.S. “Luis de Góngora” (Córdoba); Dept. Biology and Geology Juan Manuel Barroso Fernández Bilingual Educational Project.

2. Does it have a metallic lustre? ► YES …………… ► NO………………

3. Is it yellow and crystallized in cubes? ► YES …………… ► NO……………… Back

4. Is it grey, with a perfect cubic cleavage? ► YES …………… ► NO……………… Back

5. Is it black - grey, and makes a red streak? ► YES …………… ► NO……………… Back

6. Is it bright yellow, has a waxy lustre, and shapeless? ► YES …………… ► NO……………… Back

7. Can it be scratched by a fingernail? Does it have a vitreous lustre, with a fibrous or tabular habit? ► YES …………… ► NO……………… Back

8. Does it have a pearly lustre, with perfect cleavage in one direction producing thin sheets ? Does it have a pearly lustre, with perfect cleavage in one direction producing thin sheets ? ► YES …………… ► NO……………… Back

9. Is it black? Is it black? ► YES …………… ► NO……………… Back

10. Does it have green grains with vitreous lustre? Does it have green grains with vitreous lustre? ► YES …………… ► NO……………… Back

11. Can it be scratched by a knife ? Can it be scratched by a knife ? ► YES …………… ► NO……………… Back

12. Does it have a vitreous lustre, white or pink colour and a good cleavage, with tiny cracks ? ► YES …………… ► NO……………… Back

13. Does it have a vitreous lustre, forming pyramids with no cleavage ? ► YES …………… ► NO……………… Back

14. Does it have a vitreous lustre, with rhombohedral cleavege? ► YES …………… ► NO……………… Back

15. BIOTITE (Sp.: biotita) Go to another sample: Quit :

16. BIOTITE (Sp.: biotita) Quit :

17. CALCITE (Sp.: calcita) Quit :

18. GALENA (Sp.: galena) Go to another sample: Quit :

19. GALENA (Sp.: galena) Quit :

20. GYPSUM (Sp.: yeso) Go to another sample: Quit :

21. Fibrous gypsum (Sp.: yeso fibroso) Quit :

22. HEMATITE (Sp.: hematites) Go to another sample: Quit :

23. HEMATITE (Sp.: hematites) Quit :

24. MUSCOVITE (Sp.: moscovita) Quit :

25. OLIVINE (Sp.: olivino) Quit :

26. ORTHOCLASE (Sp.: ortosa) Quit :

27. PYRITE (Sp.: pirita) Go to another sample: Quit :

28. PYRITE CUBE (Sp.: cubo de pirita) Quit :

29. QUARTZ (Sp.: cuarzo) Quit :

30. SULPHUR (Sp.: azufre) Quit :

31. If you have followed the chart correctly, this mineral is not in our data base ► Start again ► Quit What do you want to do now?