This unusually beautiful gemstone is a plume agate. Plume agate is a famous and rare semi precious gemstone agate. It was formed during the miocene period. Plume agate is primarily mined from the states of oregon and colorado in the usa. Its name comes from an allusion of the plume like shapes exhibited in the material. This gemstone features a lovely pattern of ornate plumes in snowy and ivory white set in a background of translucent agate. All henryka jewellery comes complete with a beautiful presentation gift box. Stone natural plume agatematerial 925 solid silverapprox pendant size 35mm x 25mm beautiful gemstones designed by naturethe henryka designer gemstones collection is a celebration of completely natural and beautifully rare gemstones from across the world.each gemstone is carefully hand chosen by us for its natural and un treated colours and patterns. We look for vibrant gemstones we know you will love, as well as rare gemstones you may have never even heard of from all corners of the earth.instead of seeking perfection, we choose gemstones based on the natural quirks and inclusions that make them entirely unique. This means incredible stripes, bold spots, wave like ripples and swirls that give each gemstone its own unique fingerprint.these characterful gemstones are then cut, polished and set by hand into silver jewellery designs, from statement necklaces to rings, earrings and bracelets. When wearing a piece of henryka designer gemstone jewellery, you can be assured that no one will ever be wearing the same piece. It is individual to you.