gemstone
Blue Agate Tower
Silicon Dioxide (Chalcedony), SiO2
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, blue-gray color with visible banding, waxy to vitreous luster, and trigonal crystal system.
Identified More gemstone →
Explore Blue Agate Tower in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness of 6.5 to 7 on the Mohs scale, blue-gray color with visible banding, waxy to vitreous luster, and trigonal crystal system.
Formation & geological history
Formed through the deposition of silica-rich groundwater in cavities of volcanic and metamorphic rocks over millions of years.
Uses & applications
Widely used in decorative crystal towers, jewelry, ornamental carvings, and lapidary collections.
Geological facts
Agate has been used since ancient times for protective amulets and ornate seals. The banded patterns form in rhythmic layers as silica solutions change in composition.
Field identification & locations
Identified by its distinctive translucent banding and conchoidal fracture. Commonly found in Brazil, India, and the USA.
More like this
Other gemstone specimens
Ammolite
Ammolite (Biogenic Aragonite with trace elements; fossils of Placenticeras meeki and Placenticeras intercalare)
mineral
Gemstone Ring
N/A - Set piece of jewelry, likely Amethyst or Garnet with Diamond or CZ
gemstone
Amber
Succinite (Organic Gemstone)
mineral
Diamond and Gold Jewelry
Carbon (Diamond) / Au (Gold)
gemstone
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Pearl necklace
Pearl, primarily aragonite (CaCO₃) and conchiolin
gemstone