Agate

Object/Artifact

-

Crater Rock Museum

Name/Title

Agate

Entry/Object ID

2009.62.117

Description

Chemical Composition: Si O2 Crystal System: Hexagonal Description: Large slab of Brazilian Agate Common Name: Banded agate Age: Location data: Southern Brazil, South America Description: Large polished slab, banded colors going from brown, tan, beige, white, clear with crystal presences Size: 10.5" X 5.75" width 1" Type of Fossils Present: None Grain Size: Fine Hardness: 7 Quartz Luster: Glassy Occurrence: Brazilian agate, which is found as sizable geodes of layered nodules. These occur in brownish tones interlayered with white and gray. Quartz forms within these nodules, creating a striking specimen when cut opposite the layered growth axis. It is often dyed in various colors for ornamental purposes. Pressure: Moderate Rock Color: Medium Rock Origin: Terrestrial Rock Type: Sedimentary Specific Gravity: 2.6 Surface Process: Not apparent Temperature: Moderate Texture: microcrystaline Variety: Agate is a microcrystalline variety of quartz (silica), chiefly chalcedony, characterised by its fineness of grain and brightness of color. Although agates may be found in various kinds of rock, they are classically associated with volcanic rocks but can be common in certain metamorphic rocks

Collection

Suomynona Mineral Collection, Suomynona Collection

Dimensions

Width

4-1/2 in

Depth

2-5/8 in

Length

8-3/16 in

Dimension Notes

Dimension taken at widest points

Location

Location

Shelf

CS-G-7

Room

Curation Storage

Building

Crater Rock Museum

Category

Storage

Moved By

Curator

Date

February 14, 2024