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.....
Turquoise gets its distinctive blue-green color from the presence of copper within the mineral. The more copper present, the more vibrant the turquoise will appear. Other minerals, like iron or aluminum, can also contribute to variations in color.
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.