Types of Opal
Opal Stones – 4 major types of opal
Opals are classified into two types, “Light” and “Dark”. This categorization is based on the body colour of the opal.
Light Opal (White Opal)
Commonly referred “White Opal’, it can be identified by a light body tone. White Opal is not quite rare as the black varieties.
Milky White Opal – this is the most common type of opal, and is translucent with a creamy appearance which dominates the diffracted colours.
Regular White Opal – the base colour ranges from whitish to yellow. The diffracted colours are brighter than in milky opal and often the stone has a degree of transparency.
Grey Opal – This is almost always opaque to translucent ranging from light grey colour. Opal darker than it classed as black opal.
Opal of any body colour will be opaque, translucent or transparent. When an opal is transparent or very translucent and the clarity of colour is sharp it is called a “Crystal Opal”.
This variety includes opal which is transparent or very translucent and in better qualities show a distinct and very bright range of colours. Light Crystal Opal generally comes from South Australia.