Locality - Madagascar
Size – 86 x 45 x 34mm
Weight – 150g
This green opal standing freeform boasts vivid lime green colour throughout with citrus orange hints. It has been artistically shaped to a unique, curved top-heavy form and polished to a high lustre, ideal as a natural dislay piece. Due its top-heavy form and overall shape, this stone should be placed on a sturdy, flat surface where it will not be knocked or disturbed. Green opal is very scarce and only found in limited quantities in Madagascar.
About Green Opal
Opal is a gem consisting of amorphous silica and 3-13% water, found lining and filling cavities in igneous and sedimentary rocks where it has been deposited from circulating waters. It is not actually considered a true mineral due to it's lack of fixed chemical makeup or crystallince form, and so is instead classed as a 'mineraloid'. Opals are divided into three subgroups; precious opal, yellow-red fire opal and common opal. Precious opal is the most highly regarded, displaying a stunning play of colours on it's surface – known as 'opalescence' – produced by the refraction and reflection of light within it.
Opal in History
Many experts believe that the name 'opal' derives from the Indian Sanskrit word 'upala' meaning 'stone' or 'precious stone', and the ancient Latin name for it was 'opalus', meaning 'see a colour change'. This gemstone has been treasured for centuries and is used extensively in jewellery to this day. The oldest opal artefacts ever found were uncovered in a cave in Kenya and date back to 4000BC, and they were likely of Ethiopian origin.