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Paraiba Quartz – Paraiba quartz is a clear quartz that has been treated with a thin film layer to enhance its color. The bright blue color of this treatment is called Paraiba, as it resembles the bright blue natural Paraiba tourmalines in Brazil.
Peridot – Peridot is a gem quality olivine and is one of few gems that occurs in only one color (green), though it can vary between a yellow-green to an olive-green. Peridot has a glassy luster and the saturation of color depends on the iron content within the stone.
Phosphorsiderite – Phosphosiderite is a phosphate iron mineral with a vitreous luster that occurs in red-violet, lavender, orchid or even mossy blue hues.
Pietersite – Pietersite is a quartz variety of tiger’s eye that displays strong chatoyancy and ranges between golden bronze tones, deep rich blues and even red.
Pink Topaz – Pink topaz is the rarest naturally occurring topaz, though a colorless topaz can be treated to display a vivid pink hue. When natural, pink topaz is extremely valuable.
Prasem Crystal – Prasem Crystals are green quartz with Actinolite inclusion. The green coloring of the Actinolite comes from iron inclusions and are considered a Greenschist. These elongated crystals are found in Greece and China.
Prehnite – Prehnite is a silicate mineral of calcium and aluminum. It ranges between a pale green yellow tone to a grey white tone and often grows as stalactites or botryoidal formations in the veins and cavities of basalt. The majority of gem quality green Prehnite is found in Australia.
Print Stone – Print Stone, or Newsprint Jasper, is a silicate sandstone of sedimentary rock found in Australia. It displays various tones of browns and reds, creating banded patterns.
Psilomelane – Also known as Black Hematite, Psilomelane is not actually an iron ore, but rather a manganese oxide mineral. Growing as either a stalactite or botryoidal formation, this stone is predominately black with silver grey submetallic banding.
Purple Chalcedony – Chalcedony is a silica oxide mineral with a waxy luster that can be found in an array of colors. Purple Chalcedony is a lavender tone which is slightly translucent.
Purpurite – Purpurite is a manganese phosphate mineral who’s pink to red-violet tones come from iron and manganese inclusions. This brittle stone forms only as masses and has a matte sheen.
Pyrite – Pyrite, often called Fool’s Gold, is a common iron sulfide mineral with a metallic brass luster often forming in cubes or as thin layers on fossils or other minerals such as Pyritized Ammonites.