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It is these physical stresses designed into tempered glass which make it vulnerable to ninja rocks. Made of shards of aluminium oxide ceramic, ninja rocks are very hard, and very sharp. When thrown at tempered glass, the ninja rocks' sharp, hard point focuses impact energy into an incredibly small area without blunting.
These smaller, granular chunks are less likely to cause deep penetration when forced into the surface of an object (e.g. by gravity, by wind, by falling onto them, etc.) compared to larger, jagged shards because the reduction in both the mass and the maximum dimension of a glass fragment corresponds with a reduction in both the momentum and the ...
The c. 3rd–1st century BCE Chuci ("Songs of Chu") mentions the paired gems, "Shards and stones are prized as jewels / Sui and He rejected". This poetic anthology also says, "It grieves me that shining pearls [明珠] should be cast out in the mire / While worthless fish-eye stones are treasured in a strong-box", and describes a flying chariot ...
Ash-flow tuffs typically consist of countless microscopic shards of volcanic glass. [3] Basalt, which is low in silica, forms glass only with difficulty, so that basalt tephra almost always contains at least some crystalline material (quench crystals). [2] The glass transition temperature of basalt is about 700 °C (1,292 °F). [4]
A durable silvery metal; very light and extremely strong. Mithril means "grey gleam", but is translated as "true silver". [47] It is mined in native form in Moria. It can also be worked into other forms with unusual properties such as reflecting only the light of the Moon. The fictional metal has appeared in other fantasy universes, games, and ...
Sea glass begins as normal shards of broken glass that are then persistently tumbled and ground until the sharp edges are smoothed and rounded. In this process, the glass loses its slick surface but gains a frosted appearance over many years.
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Dragon's breath consists primarily of magnesium pellets/shards. When the round is fired, sparks and flames can shoot out to about 100 feet (30 meters), although, some sources claim it extends to 300 feet (91 meters). [1] Dragon's breath is normally chambered in 12-gauge 2 + 3 ⁄ 4-inch (18.5 mm × 69.9 mm) shot shells. The rounds are safe to ...