Unusually shaped nodules are light, beige, or reddish and might contain light concentric bands. The name refers to a translucent mineral with its surface layer that reminds snakeskin. This material can be found on the Oregon Coast beaches, in rivers, and in road cuts. The chalcedony contains fine hair or needle-like mineral inclusions embedded into the agate. Unique Polka Dot agate is produced in Central Oregon at Polka Dot Agate Mine. The translucent material may have white, pale beige, or blue base colors with sharp or spherical dots of different sizes and colors. The material can be found around Graveyard Point, the Oregon-Idaho border. The rarest agate contains plume-like mineral inclusions in a variety of colors. Due to Moss Agate lacks the banding pattern, it is not a true agate.
The rarest translucent agate with embedded green mossy or fern-like inclusions. Rare agate produces a unique iris effect when the mineral is held towards light, it shows prismatic colors of thin bands. Currently, the collecting area is the private property of the timber company and is closed to collecting. Holey Blue is found in the hills near the small community of Holley, 4 miles away from Sweet Home. The beautiful highly-prized material ranges from translucent light blue to opaque purple in color. The other layers of silica were arranged around the eyes.īands crystallize into concentric layers, where all bands connect to each other, creating walls similar to the fortifications of a castle. The remaining small droplets crystallized into solid concentric chalcedony known as "eyes". Often found on the Oregon Coast.Īgate was formed when the most part of the silica gel drained from the cavity. Enhydro agates may have other inclusions. Found in the Crooked River Area.Įnhydro (“water” in Greek) Agate or Water AgateĪgates with enclosed tiny bubbles of water or air moving around that were trapped inside millions of years ago. The base is usually colorless, white, gray, and sometimes purple. The rarest agate has tree-like or fern-like patterns – mineral impurities locked inside. Found in rivers, on beaches, and in mountains. The material can be found around Graveyard Point, the Oregon-Idaho border.Ĭolored by iron oxides, the agate is a translucent reddish-brown or reddish–orange chalcedony. When cut, the cross section often looks like plum agates. The tough and attractive mineral has excellent working properties, a high hardness of 7 (the Mohs Scale), acid resistance, and an excellent polished surface quality.Ī rare material has irregular or sometimes botryoidal (grape-like) surface. Unbanded translucent or semitransparent materials with no inclusions that look like agates are chalcedony.ĭistinctive banding, color patterns, and "impurities" make the agate unique and desirable.Ĭomposed of silicon dioxide SiO2, agate is a translucent or semitransparent fine-grained microcrystalline or cryptocrystalline quartz. The term "Agate" is also used for non-banded chalcedony with various types of inclusions such as moss, plume, or flame agate. This type of chalcedony is considered to be semiprecious gemstones.Īgate is a concentrically banded form of chalcedony. While low in monetary value (aside from some exceptional pieces), agates can be used to create stunning jewelry, beads, vases, ornaments, and other artworks. UV MineralsOpen discussion area.Among the various leisure activities that the state of Oregon boasts of, agate hunting is one of the most thrilling and most enjoyable. Currier Digital LibraryOpen discussion area. Techniques for CollectorsOpen discussion area. Minerals and MuseumsOpen discussion area. Mineralogical ClassificationOpen discussion area. Lost and Stolen SpecimensOpen discussion area. ╳Discussions 💬 Home 🔎 Search 📅 Latest Groups EducationOpen discussion area.
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