Cyclopean masonry is a form of stonework where massive stone boulders are fitted together with minimum gaps between adjacent stones. Typically without any tooling, leftover gaps in cyclopean walls are generally filled with smaller stones without mortar. Cyclopean masonry is notably found in ancient Mycenaean architecture and is named after the mythical Cyclops who would have the strength necessary to move the enormous stones into place.
Random uncoursed rubble stone masonry is made by stacking broken stones of widely different sizes and qualities. Considered the cheapest and roughest type of stone masonry, random uncoursed rubble masonry is typically made up of stones pulled directly from the land with minimal efforts used to to prepare the corners of the stones before they are laid. Large stones are laid first and the spaces between are followed with smaller broken stones. Random rubble masonry is laid with discontinuous but roughly level courses with expressed faces to emphasize the natural qualities of the stone shapes.
Squared rubble stone masonry consists of stones squared on all joints through facing methods of hammering or chiseling the stone. Squared rubble can consist of various sized stones and can be laid in equal courses, coursed every third or fourth stone, or uncoursed. Squared rubble stone masonry is often found in hilly regions with readily available quality and cheap stones.
Broken ashlar, or random range ashlar, is a form of stone masonry that deploys tooled ashlar blocks in horizontal courses consisting of varied bricks within each same sized course. Each course may be broken into smaller intervals of two or more courses as necessary which will provide a more organic and layered pattern.
Coursed rubble stone masonry is made with broken stones of widely different sizes and qualities that are laid in level courses. One of the most common forms of masonry construction, coursed rubble stones are typically hammer dressed to be shaped into more controlled and equal sizes. Coursed rubble masonry is laid with continuous and approximately level courses that can have varied heights along the length of each course.
Random uncoursed ashlar is a type of stone masonry that uses finely tooled ashlar stones laid in random and discontinuous courses. Consisting of various size stones with highly processed and dressed rectangular shapes, uncoursed ashlar provides a more organic pattern while remaining structurally strong with engineered and controlled joints and bonds.