Silicates & Quartz
Chalcedony
What it is
Microcrystalline quartz — the same SiO₂ formula, but with crystals too small to see individually. This gives chalcedony its waxy luster and translucent glow instead of quartz's glassy transparency. Agates, jaspers, and carnelian are all chalcedony varieties.
How it forms
Forms when silica-rich groundwater slowly deposits microscopic quartz crystals in cavities, cracks, and volcanic gas bubbles. The banded patterns in agates come from rhythmic deposition — each band represents a change in the water's chemistry.
SiO₂ — Microcrystalline Silicon Dioxide
Specimens
10 stones
Agate
Grounding · Root
Rhythmic deposition in rock voids.
Bloodstone
Vitality · Root
Green jasper with hematite 'splatters.'
Blue Lace Agate
Calm · Throat
Trace minerals in slow-moving water.
Botswana Agate
Calm · Root
Volcanic activity in the Limpopo area.
Carnelian
Vitality · Sacral
Chalcedony colored by hematite.
Chrysoprase
Growth · Heart
Rare green chalcedony via nickel.
Fire Agate
Vitality · Root
Light interference from iron layers.
Flower Agate
Growth · Heart
Plume inclusions that look like blooms.
Moss Agate
Growth · Heart
Manganese dendrites look like moss.
Onyx
Protection · Crown
Parallel bands of chalcedony.