Superb Gem Koroit Opal Freeform Cab 50.69cts Bright Green/Blue Fires/veins Investment

I have for sale a Superb cut and polished Koroit Opal Cab/Freeform. This one weighs 50.69cts and is 38x21x8mm. It has beautiful bright Blue/Green patterns a good portion of the front and one side. The back has some bright fires showing through, mostly in the middle section. if another mm were to go might have a double sider. It does have some Red/Gold/Orange in the back corner on the base. Quality piece, would make a notable pendant stone, or add to a collection. Thanks for looking.