The manual is typically split into two volumes in its Spanish edition: Volume 1 (Chapters 1–9): Focuses on concepts and techniques

(based on the work of James D. Dana and often revised by Cornelis Klein and Cornelius Hurlbut). In the Spanish-speaking world, this 4th edition is the translation of the 21st American edition

Understanding the 32 crystal classes and Miller indices to describe crystal faces. Physical Properties: Mohs scale