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Sodalite crystals are tough but can scratch easily; they typically rank 5.5-6 on the Mohs hardness scale, making them softer than quartz (7-7.5) and topaz (8), but harder than fluorite (4) and ...
Sodalite is a deep blue to blue-violet mineral best known for its use in jewelry, sculpture, and decorative stonework. Sodalite forms in igneous rocks that crystallized from sodium-rich, silica ...
Sodalite was first discovered in Greenland in 1811 but became popular after the gemstone was found in Ontario, Canada in 1891. The mineral is a deep blue color and visually looks similar to ...
Fluorescent sodalite syenite, also known as “Glowdalite” for its fluorescence, formed in Michigan about 1.1 billion years ago. It was during a particularly violent geological period when North ...
The name Yooperlite is a portmanteau of Yooper—the name for people from the Upper Peninsula in Michigan—and sodalite. TR15336300101. Although the fluorescing sodalite is common, ...
Yooperlites, sodalite-bearing syenites that possess fluorescent properties, are now on display in the Upper Peninsula at the A.E. Seaman Mineral Museum at Michigan Tech University in Houghton.
WITH reference to the properties of Indian sodalite shown by Mr. T. H. Holland at the York meeting of the British Association (September 27, p. 550), will you permit me to point out that, although ...