Cua Matrice

Officially titled Lu Cua Matrice d'le Mon (The Four Materials of the World) but most frequently called Cua Matrice (Four Materials) is a book by Frisian author Maseé Hodel. The guide describes the four categories of materials that are used in our world. The book is separated into four sections describing each of the categories.

Contents
According to Hodel, there are four categories of materials:

Those easy to find, and easy to produce - Type I

Those easy to find, but difficult to produce - Type II

Those difficult to find, but easy to produce - Type III

Those difficult to find, and difficult to produce - Type IV

L'Tep É / Type I
Type I materials are ones that are not only easily found in nature but can be replicated by man with relative ease. Hodel includes most small plants under this category, but not wood.

L'Tep Du / Type II
Type II materials are ones that are easily found; yet, are difficult to replicate by man. Hodel often includes wood, stone, and water within this category. The reason he places wood under this category rather than under Type I is because trees take a long time to produce a useful amount of lumber. Hodel feels this long time period of growing makes the material difficult to replicate by a single man.

L'Tep Tri / Type III
Type III materials are difficult to find by a person; yet, are relatively easy to produce. Hodel places man-made materials (matre d'Homile) under this category. Hodel also categorizes many dishes and consumable goods under Type III due to their nonexistence in the environment.

L'Tep Cua / Type IV
Type IV materials are those that are most difficult to obtain. These materials cannot be produced or found easily. Under Type IV, Hodel places rare commodities such as diamond, ruby, and sapphire as well as precious metals such as gold, silver, and platinum.