Aventurine is a form of quartz (chalcedony to be more specific), characterised by its translucency and the presence of platy mineral inclusions that give a shimmering or glistening effect termed aventurescence. The most common colour of Aventurine is green, but it may also be orange, brown, yellow, blue, or gray. Chrome-bearing fuchsitte is the classic inclusion, and gives a silvery green or blue sheen. Oranges and browns are attributed to hematite or goethite. The majority of green and blue-green Aventurine originates in India. Creamy white, gray and orange material is found in Chile, Spain and Russia.
SOLD As blue a the waters of the Caribbean, a blue colored 2 inch Sonoran Glass Leaf is the focal point of this 20 inch necklace. Opalite and Lapis beads along with crystals have been charmed to highlight the leaf. Wavy Lapis beads and chips, bronze accents and a bronze Toggle clasp complete the necklace. Clusters of charmed beads and crystals hang from the Frech Hook earrings to complete the set.
Lapis Lazuli is a rock, not a mineral: whereas a mineral has only one constituent, Lapis Lazuli is formed from more than one mineral. The main component of lapis lazuli is Lazurite, and a feldspathoid silicate mineral. Most Lapis Lazuli also contains Calcite (white), Sodalite (blue), and Pyrite (metallic yellow). There can also be other possible constituents and trace amounts of other minerals. Lapis lazuli usually occurs in crystalline marble as a result of contact metamorphism. The finest color is intense blue, lightly dusted with small flecks of golden Pyrite. Stones with no white Calcite veins and only small Pyrite inclusions are more prized. Patches of Pyrite are an important help in identifying the stone as genuine and do not detract from its value. Often, inferior Lapis is dyed to improve its color, producing a very dark blue color with a noticeable grey cast which may also appear as a milky shade. Lapis takes an excellent polish and can be made into jewelry, carvings, boxes, mosaics, ornaments, and vases.
Opalite is a stone mined in Utah that comes in varying shades of purple, lavender and creamy white with swirls of yellowish-brown and pink. Opalite is also referred to as Tiffany Stone. Opalite is also a trade name for synthetic opalized glass and various opal simulants. The name is also many times used to promote impure varieties of variously colored common opals.