Opals are not truly minerals (because they don't have a crystalline structure), they are in a class called mineraloid. A mineraloid is an amophous, inorganics substance that lacks a crystalline structure, but are mineral in nature. You will find that in many older reference systems, they may well be classed as minerals.
Silicates.
phosphate
Apatite is a mineral that comes is blues, greens, browns, yellows and clear. It has a weak cleavage and a choncoidal fracture.
The halide mineral group.
Oxides and Hydroxides
Quartz is an Oxide Mineral.
Silicates are the most common mineral group.
Turquoise is a member of the turquoise group and is classed as a phosphate. Phosphates are a class of minerals that is part of a large and diverse group of minerals.
rejoice for turquoise
Turquoise is a mineral.
Turquoise is a member of the phosphates group. The turquoise group is composed of five minerals, all phosphates, plus or minus iron, aluminum, copper, and zinc: Ahelite, Chalcosiderite, Faustite, Planerite, and Turquoise.
A calaite is a turquoise mineral.
Turquoise.
The fracture of aquamarine is cleavage.
Turquoise. Malachite.
Apatite is a mineral that comes is blues, greens, browns, yellows and clear. It has a weak cleavage and a choncoidal fracture.
turquoise is a mineral that is used in jewelry paints pigments.....
Traces of copper
Turquoise is a greenish-blue mineral, whereas light blue is just blue diluted with white. Basically, turquoise is light blue with a bit of green added.