Agni Mani

Agni mani, aka "Pearls of Fire" or "Black Pearls of Fire", was the name given to certain tektites—glass-like objects formed when hot meteors fell from the sky and struck sand. They were typically found in deserts around Dierde.  

Powers

  This gemstone could absorb a small random portion of an explosive blast, such as produced by a fireball or beads of force, vaporizing in the process. Agni manis only protected the being that was carrying or wearing them.

Properties

Material Characteristics

Agni mani specifically meant the black variety of these irregularly shaped objects. They were used unmodified in magic items, or bits of them were sewn into garments for their protective quality. A typical specimen had a base value of 10 gp.

Compounds

Tektites are made of opaque to translucent, green, brown, grey, yellow-grey or black glass. Moldavites are typically green, while Australites are usually black or dark brown.   Their chemical compositions are similar to both granite and impure sandstone (greywacke) or soils of these compositions, being high in silica (68-82%) with 10-14% alumina and lesser iron, magnesium, calcium, potassium and titanium. These components did not have time to combine and form crystals, but cooled quickly to form a glass.   Tektites do not contain any water. They can be mistaken for obsidian or pitchstone (black volcanic glasses), but these will emit some water on strong heating. With a hardness of 6-7 on Moh's scale, tektites will easily scratch window glass. They have a density range of 2.2 (Libyan glass) to 2.8 (Moldavites), but are usually 2.4 to 2.5 grams per cubic centimetre. This is a little lighter than quartz beach sand. Human built objects can be mistaken for tektites, particularly molten bottle glass, glass marbles, and black buttons. Many of these will not have the correctly-shaped rims, symmetrical structures or colours of real tektites, while others will be too heavy or too light.

Origin & Source

These tektites were formed when a meteorite crash lands
Type
Ore/Mineral
Value
10 gp
Rarity
Common