Goldstone Carvings (1)
Goldstone for Jewellers (6)
Goldstone Jewellery (2)
Goldstone Tumblestones (3)
Rough Goldstone (2)
Appearance, Uses and History
Goldstone is an interesting man made glass which is created in blue, red, and green.
It is often sold polished, as tumblestones or carvings or jewellery. The rough pieces are not especially common but can be purchased for lapidary – although precautions should be taken as they are a form of glass.
The glass is created by mixing glass and metal in an oxygen reducing furnace atmosphere; crystallisation allows the metal to become shiny inclusions in the glass itself.
Red and Blue Goldstones are the most common, and contain Copper and Cobalt respectively. Green Goldstone takes its colour from Chromium oxides.
While one manufacturing process for Goldstone was invented in Venice in the seventeenth century, there is some archaeological evidence that it was made in the 12-13th Century in what is now Iran.
Goldstone was originally referred to as ‘Aventurine glass’, and was the source of both the word ‘aventurescence’ and the mineral name ‘Aventurine’. This is unusual; normally synthetics and glasses are named after minerals that are already popular!
Goldstone is a man-made glass and as such doesn’t really have a ‘locale’.
Historically, it was made in Murano and Venice, in Italy. In the modern day, I’m actually having trouble finding any information but we can assume production has likely moved East, probably to China.
Goldstone consists of normal silica glass with metal inclusions – Copper oxide, Cobalt, Manganese, or Chromium Oxides.
If you’re interested, you can read this 19th century recipe for the glass.
Photos of Blue Goldstone Glass
Photos of Brown/Red Goldstone Glass
Photos of Green Goldstone Glass
Hazards and Warnings
Goldstone is a glass, which can be extremely sharp when broken. I have had to process very large specimens into smaller pieces and this was quite scary!
Almost all rocks, minerals (and, frankly, almost all other substances on earth) can produce toxic dust when cutting, which can cause serious respiratory conditions including silicosis. As a glass, Goldstone is certainly not an exception!
When cutting or polishing rocks, minerals, shells, etc, all work should be done wet to minimise the dust, and a suitable respirator or extraction system should be used.
Includes translations for ‘goldstone glass’ and ‘aventurine glass’ in an attempt to cover as many languages as possible. However, due to the simplicity of this term – ‘gold’ ‘stone’ ‘glass’, it is likely automated translators cannot effectively translate it. It is especially difficult considering ‘aventurine glass’ contains the name of another mineral, ‘aventurine’.
- زجاج جولدستون
- زجاج افينتورين
- vidro de goldstone
- Goldstone glass
- Aventurine glass
- Golden Sandstone (extremely misleading; should not be used as Sandstone is not a glass at all).
- vetro avventurina
- стекло голдстоуна
- vidrio goldstone
- vidrio de aventurina
Mandarin and Traditional Chinese:
Further Reading / External Links
- https://www.mindat.org/article.php/112/%22Goldstone%22+-+Aventurine+Glass (probably the best article on the subject)