NIce Large Welo Crystal Opal specimen rough 221cts Multicolours sat in Some sand

I have for sale a Nice Large Welo Crystal Opal Specimen from Ethiopia. This one weighs 221cts and is 45x31x29mm,.,.  It is a Large Amber Opal sat in some Clay/Sand. It has a Multicolour Green/Red/Blue Bar through the top section of Opal, this can be seen running through to the other side. Very clean looking opal when held to light too. Great Specimen, maybe tumble polish/clean, or leave as a large specimen, this type of opal is prone to cracking if cut on a a wheel.  Nice large piece.,.,.,. Thanks for looking,.,.