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  2. Glass knife - Wikipedia

    en.wikipedia.org/wiki/Glass_knife

    This extends the life of the diamond blade which is used only when its superior performance is critical. [citation needed] Obsidian, a naturally occurring volcanic glass, is used to make extremely sharp surgical scalpels, significantly sharper than is possible with steel. The blades are brittle and very easily broken.

  3. Obsidian - Wikipedia

    en.wikipedia.org/wiki/Obsidian

    The major disadvantage of obsidian blades is their brittleness compared to those made of metal, [66] thus limiting the surgical applications for obsidian blades to a variety of specialized uses where this is not a concern. [62] Pig carved in snowflake obsidian, 10 centimeters (4 in) long. The markings are spherulites.

  4. Sharpness (cutting) - Wikipedia

    en.wikipedia.org/wiki/Sharpness_(cutting)

    Sharpened metal drop-point blade Naturally occurring sharp obsidian piece Shark tooth with a sharp, serrated edge A sewing needle comes to a sharp point. Sharpness refers to the ability of a blade, point, or cutting implement to cut through materials with minimal force, and can more specifically be defined as the capacity of a surface to initiate the cut. [1]

  5. Macuahuitl - Wikipedia

    en.wikipedia.org/wiki/Macuahuitl

    Despite being sharper, prismatic obsidian is also considerably more brittle than steel; obsidian blades of the type used on the macuahuitl tended to shatter on impact with other obsidian blades, steel swords or plate armour. Obsidian blades also have difficulty penetrating European mail. The thin, replaceable blades used on the macuahuitl were ...

  6. List of blade materials - Wikipedia

    en.wikipedia.org/wiki/List_of_blade_materials

    A variety of blade materials can be used to make the blade of a knife or other simple edged hand tool or weapon, such as a sickle, hatchet, or sword. The most common blade materials are carbon steel, stainless steel, tool steel, and alloy steel. Less common materials in blades include cobalt and titanium alloys, ceramic, obsidian, and plastic.

  7. Scalpel - Wikipedia

    en.wikipedia.org/wiki/Scalpel

    Scalpel blades are usually made of hardened and tempered steel, stainless steel, or high carbon steel; in addition, titanium, ceramic, diamond and even obsidian knives are not uncommon. For example, when performing surgery under MRI guidance, steel blades are unusable (the blades would be drawn to the magnets and would also cause image artifacts ).

  8. Prismatic blade - Wikipedia

    en.wikipedia.org/wiki/Prismatic_blade

    Prismatic blades are flaked from stone cores through pressure flaking or direct percussion. [2] This process results in a very standardized finished tool and waste assemblage. The most famous and most prevalent prismatic blade material is obsidian, as obsidian use was widespread in Mesoamerica, though chert, flint, and chalcedony blades are not ...

  9. Microblade technology - Wikipedia

    en.wikipedia.org/wiki/Microblade_technology

    Microblade technology is a period of technological microlith development marked by the creation and use of small stone blades, which are produced by chipping silica-rich stones like chert, quartz, or obsidian. Blades are a specialized type of lithic flake that are at least twice as long as they are wide. [1]