The following is a list of books you can find at the Petrologist Librarian and what they cost.
Title
Alchemical Mineralogy
Chalk Glance Lore
Flakestone Lore
Jadeite Lore
Kyanite Lore
Maalite Lore
Magmum Lore
Minerology
Petrology
Pyropite Lore
Pyroxene Lore
Sanguinite Lore
Sedimentary Rock
Waterstone Lore
Skill
Material Lore
Material Lore
Material Lore
Material Lore
Material Lore
Material Lore
Material Lore
Material Lore
Material Lore
Material Lore
Material Lore
Material Lore
Material Lore
Material Lore
Cost
50s
5g
10g
50s
10g
2g 50s
2g 50s
10s
10s
10g
2g 50s
10g
10s
10g