It is transparent with a yellowish tint against a white background, but full of Blue fire throughout which is much more visible against a black background.
That is very rare as is the Blue fire in Opal. It is oval in shape - It is 12mm X 6 mm X 5mm.
The weight is 3.82 carats. There may be an extra charge for shipping by Fedex or another insured carrier. Third party insurance may be necessary. Canada Post allows only $1000/ item. Please inquire before purchasing. I can get a quote depending on the location. I would rather there were no surprises regarding the cost of shipping and insurance and the safety of the package.