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    Boulder Opal ready to be cut into Gemstones

    BEST OF BEST 19.14Ct Incredible Pattern +NEON Rainbow Color Welo Opal Rough

    Welo Honeycomb Opal - Ethiopia

    Uncut diamonds.

    Coyamito Agate Pseudomorph | ©Uwe Reier Rancho Coyamito Norte, Mexico (2013). Pseudomorphs in agate are quite rare but do occur in nodular agates from various locations, usually as a calcite or aragonite replacement.

    Marble Ammonite Fossil from Russia

    Quartzo azul rutilado.

    In ancient Egypt, lapis lazuli was a favorite stone for amulets and ornaments such as scarabs; it was also used in ancient Mesopotamia by the Sumerians, Akkadians, Assyrians, and Babylonians for seals and jewelry. In the Epic of Gilgamesh; the oldest known story in human history, lapis lazuli is referenced several times. Lapis jewelry has been found at excavations of the Predynastic Egyptian site Naqada (3300–3100 BC), and powdered lapis was used as eyeshadow by Cleopatra.

    amethyst geode

    Giant amethyst geode from Uruguay

    Genevievella granulatus from Trilobite Order Ptychopariida, Family Llanoaspididae, collected in the Cambrian Weeks Formation of Utah. One of my favorite trilobites.

    Ethiopian opal

    Lantian Man is the name given to subspecies of Homo erectus of which ancient fossils were found in Lantian County, Shaanxi Province in China in 1963. Lantian Man were originally dated to 1.15 mi

    Scottish Agate

    ,section of a Koroit Opal nut

    61.10 cts "Harlequin" Opal

    Thunderegg with fractures

    Petrified wood

    Sardonyx:The stone of senses. It improves sensory perception and strengthens the parasympathetic nervous system. Helps prevent bronchitis and infections of the respiratory tract. It sharpens the mind. Helps the wearer confront the world with open eyes and not get lost in dreams. It encourages the sense of reality in Capricorns and also helps Aries to distinguish what is essential.

    A cabochon of crayola jasper, from Nevada. The material was aptly named because it really does have the appearance of a box of melted crayons. www.gemstonecabs.com

    blue/green seam opal from the Koroit Opal Field < Australia

    Polished Pietersite (by Asbestorama) The wonderful chatoyant effect of this pietersite specimen owes itself to the fibrous nature of the predominant mineral involved, crocidolite (asbestos). The appearance of fragmented (or brecciated) crocidolite is unique to pietersite.

    Lightning Ridge black opal. www.flickr.com/...