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https://www.gemselect.com/gem-info/sunstone/sunstone-info.php
May 09, 2014 · Sunstone is not one of the more popular gemstones, but it is quite suitable for most jewelry applications. It is slightly softer than quartz and exhibits perfect cleavage along with a splintery fracture and brittle tenacity, which means that some …
https://www.firemountaingems.com/resources/encyclobeadia/gem-notes/gmstnprprtsrgns
Sunstone began as a costly and little-known gemstone until deposits were found in Norway and Siberia. This gemstone has a special history in the United States, however, where sunstone varieties called "heliolite" have been mined in Oregon. One particular sunstone was …
https://www.gia.edu/sunstone/buyers-guide
Color is the Most Important Sunstone Quality Factor. Top-color deep green, deep red, and intense bicolored sunstones are considered extra-fine quality. Red sunstone is often marketed as “spinel red.” Its vivid hue—if not its hardness—rivals spinel and even ruby.
https://geology.com/gemstones/sunstone/
Sunstone Jewelry. When "Oregon Sunstone" was declared the "state gemstone" by the Oregon Legislature, jewelry designers and lapidaries were inspired to work with sunstone and promote it to Oregon residents and tourists. This created a patronage for a gemstone produced in the United States - especially in the state of Oregon.
https://www.minerals.net/gemstone/sunstone_gemstone.aspx
The Gemstone Sunstone Sunstone is an interesting feldspar gemstone with a glittery appearance and usually an orange or reddish color, hence its name. The glitter effect is caused by inclusions of the mineral Hematite, or sometimes also Goethite or Pyrite (and in one rare instance, Copper).
https://www.gemdat.org/gem-10984.html
Sunstone is a plagioclase feldspar that has red, more rarely green or blue glitter which is caused by light reflections from tiny hematite or goethite platelets. The name derives from sunstones believed to have been used for navigation in the Middle Ages. Sunstone is the official gemstone of Oregon, USA.
https://www.ajsgem.com/gemstone-information/sunstone-107.html
Sunstone is a gemstone that is formed as crystals in slow cooling basaltic lava flows, much like Peridot. Sunstone is actually closely related to moonstone. Large quantities of gem-quality labradorite, most of it water-clear, straw yellow, or yellow sunstone, have been produced from …
https://www.gia.edu/sunstone
Sunstone is a member of the feldspar group. Both the orthoclase and the plagioclase feldspar species boast a sunstone variety. Other feldspar group gems include moonstone, non-phenomenal orthoclase, phenomenal and non-phenomenal labradorite, and amazonite.
https://www.jewelryshoppingguide.com/sunstone-gemstone-guide/
Called ‘sunstone’ due to its glittering inclusions and smooth sheen, this feldspar gemstone has been known for several centuries but not commonly used in jewelry. Rather, the sunstone was valued for trading and bartering. Found in variations of red-brown hues, the sunstone is a beautiful addition to any jewelry collection.
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