Among the smallest geodes mined anywhere in the world.
Many from this ground come out under a centimetre across. They sit in hard volcanic rock and there is no machine that helps; they are chiselled out individually by hand, from pits dug for that single purpose, and the rock does not give them up easily.
Which is the part worth sitting with. The same geological process that makes the enormous amethyst cathedrals from Brazil, gas cavity, mineral-bearing water, crystals growing inward, also makes this. Identical mechanism, different scale. Nothing about being small makes it a lesser example. It just took a smaller bubble.
Mineral: Quartz (silicon dioxide, SiO₂), a chalcedony rind with druzy quartz inside
Crystal system: Trigonal
Origin: Rancho Agua Blanca, Tabasco Municipality, Zacatecas, Mexico
Hardness: 7 on the Mohs scale; hard, though the rind is thin and will crack if dropped
Treatment: None
Dimensions: 1.99 x 0.79 x 2.08 cm
Weight: 6.68 g
You will receive the exact piece photographed.