Bytownite is a calcium rich member of the plagioclase solid solution series of feldspar minerals with composition between anorthite and labradorite. These feldspars are rarely encountered in gem form. It is usually translucent without a crystal form. It is usually defined as having between 70 and 90 an formula. Their occurrence is widespread throughout the world in a great variety of rock types and environments but in most cases transparent crystals are rare.
0 gems bytownite is named for bytown now ottawa canada where it was discovered. Bytownite gemstones by colour this table shows the variety of hues this gemstone can be found in. It is because composition and occurrence of bytownite is not very common and is hard to find. The mineral bytownite bytownite is a rarer form of feldspar more commonly seen as a facet ed gemstone then as a collectors mineral. Bytownite a variety of feldspar current inventory.
It also forms from sodic metasomatism of metamorphic rocks. It is usually found as compact masses and grains in gabbros norites allivalites and anorthosites. Ca 0 7 0 9 na 0 3 0 1 al al si si 2 o 8. Some other forms of feldspar especially the transparent yellow form of orthoclase are faceted and incorrectly labeled as bytownite. Check out our bytownite gemstone selection for the very best in unique or custom handmade pieces from our shops.
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It s said by gem cutters that bytownite is an easy gemstone to cut and yields a brilliant stone. Gem quality bytownite generally varies in color between pale yellow and light brown according to but other sources state that it is colourless grey wite or greenish grey. Click on a letter above to view the list of gems. Click on a photo for more information. A rare gemstone bytownite is not a well known gemstone and most probably you may not be familiar with gemstone name.It is one of rarest gemstones minerals belonging to the plagioclase feldspars family. It is one of rarest gemstones minerals belonging to the plagioclase feldspars family. It s said by gem cutters that bytownite is an easy gemstone to cut and yields a brilliant stone. It also forms from sodic metasomatism of metamorphic rocks. 0 gems bytownite is named for bytown now ottawa canada where it was discovered.
A rare gemstone bytownite is not a well known gemstone and most probably you may not be familiar with gemstone name. Bytownite is a calcium rich member of the plagioclase solid solution series of feldspar minerals with composition between anorthite and labradorite.
