What Is Pitchstone?

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  • Written By: Megan Shoop
  • Edited By: Michelle Arevalo
  • Last Modified Date: 25 October 2019
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Pitchstone is an igneous rock with properties similar to that of obsidian and flint. Like obsidian, pitchstone is a naturally-occurring glass, formed from quickly cooled lava. It is somewhat darker and grainier than obsidian, making it similar in appearance to flint. All three of these stones also tend to flake and shear the same way, making them ideal for making arrowheads, spear points, and stone knife blades. Archaeologists have found weapons made of this stone in many Mesolithic-era digs, especially in areas suspected to have contained ancient volcanoes. Spiritualists may also use pitchstone in ways similar to obsidian and Apache tears because they believe it contains energetic properties that may help with certain emotional and spiritual conditions.

The formation of this stone most often occurs when lava makes contact with water or some other cooling force, like frozen ground. This molten rock solidifies too quickly to form crystals, meaning it contains no lattice structure. Instead, it is smooth like glass. Many samples of pitchstone are mottled, especially when held up to the light. Observers may see areas of opaque feldspar intermingled with smooth, glassy, transparent areas. The opaque areas often dissipate into speckles that run throughout the pieces of rock.


Archaeological finds often uncover a combination of pitchstone and flint weapons and tools. This combination is especially prevalent in Arran, an island off the coast of modern-day Scotland. A Mesolithic-era dig site there revealed that settlers in the area were able to quarry both of these stones. There seems to be no preference toward one or the other, as the settlers seem to have used both stones equally. Both stones are also very sharp and relatively strong when shaped into knives and weapon points.

Obsidian and pitchstone weapons are also often found side-by-side. Both stones form when lava cools quickly, meaning they would be easily retrieved from some of the same quarry sites. The content of the lava usually determines what kind of stone it forms when it becomes solid. Heavy feldspar deposits usually result in pitchstone, while less feldspar results in the formation of obsidian.

Many spiritualists also use these igneous stones interchangeably. Though obsidian and Apache tears are usually more readily available, pitchstone is often seen as an acceptable substitute for either. Actually, apache tears are very clear, highly polished pieces of obsidian. All of these igneous stones are said to help assuage grief and depression, and help ward off bodily diseases. They’re also supposed to help the wearer block and shed negative energy.


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