Black Feldspar Gemstone


Black Feldspar is is a dark gray or black gemstone best known for its moody schiller effect, displaying blue and violet hues all the way through greens, yellows, and oranges.

 
 
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Dark and mysterious, Black Feldspar is a gemstone that has been used in the production of jewelry since the 18th century. While gem-quality Black Feldspar is reserved for the manufacture of jewelry, this mineral has also found use in the creation of glass and as a road construction material.

Ranging in color from dark gray to black, Black Feldspar ranges from 6 to 6.5 on the Mohs scale of hardness. The moody and spectral play of color found within the stone is the result of many tiny inclusions that produce a schiller effect. As light plays across the surface of this stone, a variety of colors can be witnessed, ranging from blue and violet to green, yellow, and orange! To maximize this iridescence, Black Feldspar is primarily cut in a cabochon. Occasionally, the stone is also fashioned into beads.

Black Feldspar can be a sophisticated gem to work. In its natural state, the rough has many fractures and cracks present, which severely reduce the yield. After mining, the desirable black and gray sections of the rough need to be separated from the brown portion. Next, matching the usable stones is a painstaking and time-consuming process. This is due to the importance of sorting stones with similar properties of fire so that the finished product is uniform in quality. Finally, the setting of the stone is critical. Stones need to be set in a way that maximizes their play of fire across the surface of the stone.


GemLORE

 

• Black Feldspar is thought to be a lucky stone and promote lucid dreaming.

• Some believe that this gem will also dispel negative energies, such as depression and anxiety.

• Black Feldspar has also been credited with being a stone of peace, calming an overactive mind.


GemGPS

 

Location: Malagasy, Madagascar

Our Black Feldspar is sourced from the Malagasy region of Madagascar. These gems are mined and processed in their natural state with no additional treatments performed. Due to the intense selection process to produce the best quality gemstones, only about 2.5 - 5% of the mined rough will produce gem-quality Black Feldspar.

Madagascar
 

GemFACTS

 

• Feldspar is derived from the German word feldspat, a combination of the words feld (field), and spat (a rock not containing ore).

• Black Feldspar is completely natural. No additional treatments are used in the production of this gem.

• Black Feldspar is part of the plagioclase series of feldspar, which also includes Labradorite and Sunstone.

• The yield from rough for this gem is low, only 2.5 - 5% This is due to an intense selection process to provide the best quality gemstone.

• Black Feldspar ranks from 6 to 6.5 on the Mohs scale.