A vintage pair of sterling silver Drop Earrings. Collet set with Blue John

  

A vintage pair of sterling silver Drop Earrings. Collet set with Blue John Cabachons.

The drops & cabachons with alternating waves of dark & lilac veining. Fluorspar (Blue John) is a Semi-presious mineral, a form of fluorite. It is highly sort after for it's ornamental value. Originating from the mines in the Blue John caverns in the Peak District. Before it can be worked all genuine Blue John from this region is heated in an oven. Previously it was then placed in a bowl of pine resin (or epoxy resin nowadays) after this process it is reheated in a vacuum oven. This binds the otherwise friable crystal structure, allowing it to be turned on a lathe or saw cut then polished with putty power (tin dioxide) applied with a moist piece of felt.

Therefore all the cracks, fractures or flaws visible in the images are natural striations and very secure, unless otherwise stated. Marked ; Silver Dimensions each ; Total length 40 mm Blue John Cabochons 12 mm in diameter Drops 21 mm in length Weight; 8.7 grams In very good original condition. No chips , damage or restoration.

Clean and ready for use. The item "A vintage pair of sterling silver Drop Earrings. Collet set with Blue John" is in sale since Saturday, December 8, 2018. This item is in the category "Jewellery & Watches\Fine Jewellery\Fine Necklaces & Pendants\Gemstone".

The seller is "antico63" and is located in Sheffield . This item can be shipped to United Kingdom, Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Australia, United States, Canada, Japan, New Zealand, China, Israel, Hong Kong, Norway, Indonesia, Malaysia, Mexico, Singapore, South Korea, Taiwan, Thailand, Chile.

1. Main Stone: Blue John
2. Main Stone Colour: Blue
3. Metal: Sterling Silver
4. Metal Purity: 925 parts per 1000
5. Main Stone Shape: Cabochon