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Geologist's Primer

Geologist’s Primer is a guide to real-world magical gems, minerals, and metals.

A mix of geology, folklore, modern witchcraft, old-school alchemy, and science.

A fully-illustrated, thoroughly-researched resource for writers and world-builders.

An all-in-one book for explorers, collectors, alchemists, and enchanters—perfect as an in-world item and applicable in all fantasy (and most modern) settings.

A system-agnostic toolkit for game masters everywhere, complete with tips on including the minerals, rocks, metals, and gemstones in your campaigns.

NOW IN STORES!

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About
Geologist's Primer

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With a similar structure as Herbalist’s Primer, this book is a mix of geology, metallurgy, witchcraft, occult, folklore, and roleplaying games!

We’re covering various aspects of geology as practically used in RPGs:

  • mining (methods, threats, opportunities, ways of finding precious metals and minerals)

  • blacksmithing

  • gem-cutting and jewelry-making

  • crystal magic (for healing, divination, and spellcasting)

  • stone magic (obelisks, sacred geometry, ley lines)

  • good, old-school alchemy (the gold-making one)

  • and, of course, 100 entries about more or less popular metals and minerals, with all their industrial, decorative, and magical properties.

 

To round things up, we're also including a couple of materials that are not technically metals or minerals, but are either things that can be mined (fossils, ice, fulgurite) or are used in jewelry and widely considered gems (pearls, amber, ivory). They just fit!

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Inside the book

  • A full-color, hardcover book (6″ x 9″) with 360 pages of geology, gemology, folklore, and tabletop roleplaying material

  • 100 illustrated, detailed descriptions of magically-inclined metals, rocks, and minerals from around the world – from agate to zircon.

  • Short, sweet, and useful lore chapters on the basics of geology, identification, mining, gem magic, alchemy, magic item creation, and more!

  • Tools for creating original magical metals and minerals, plot hooks, quest ideas, and a primer to blacksmithing, so you can make your fantasy blacksmiths with even more verisimilitude.

  • Convenient tables with magical properties of geological materials and astronomical/astrological correspondences – all according to the highest authorities in the fields.

  • An index, a detailed table of contents, references, bibliography—everything you’d expect from a popular-science publication that will put an extra layer of details into your gem-hunting endeavors.

Meet the gems

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Each of the hundred entries includes:

  • a full-color illustration—all hand-drawn, 0% AI

  • quick reference tabs to orient yourself in common uses

  • common varieties of the mineral: color variations, trade names, inclusions, gem varieties

  • ​at-a-glance description for your TL;DR needs

  • basic geological information providing sensory descriptions

  • physical and chemical properties

  • notes on occurrence, extraction, and preparation

  • industrial and ornamental properties

  • in a few cases, culinary properties

  • magical and alchemical properties

  • sample magical item, with a page reference to the Magic Item chapter.

 

Would you like to read a full entry, just to make sure it’s the type of content you’re here for? Check out the FREE sample!

 

The appendices contain more information about each material: their astrological correspondences (compiled according to general modern occult knowledge, as described in 777, Cunningham’s, and later books), the science behind the folklore, pricing and rarity guide, introduction to ley lines and sacred geometry, and stones of legensd.

Do you want to see them all? Well, here you go, we’ve made a handy visual guide just for you (yes, it’s included in the book, you can roll a random rock, we got your back).

Grab the whole collection!

Geologist's Primer is not just a book. Thanks to the success of the Kickstarter campaign, we were able to release a full collection of gem-filled materials. 

  • Geologist's Notebook

  • Geologist's Coloring Book

  • Geologist's Poster

  • Geologist's Flash Cards

  • Adventure: Bedrock Lullaby

  • Adventure: Alchemist's Fugue

  • 100 Adventure Pebbles

Double Proficiency

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©2025 by Double Proficiency.

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