smooth
No. As it is synthetic it is man-made. A mineral must be naturally occurring and have a crystalline structure (among other requirements). Synthetic opal does not meet these criteria.
The way a rock or mineral feels is known as its texture. Texture describes the physical characteristics such as smoothness, roughness, or graininess of a rock or mineral when touched.
It depends.... when they have just been dug out of the round they are extremely rough and vary in shapes. Once they have been polished they are very smooth and usually a round shape.
The texture of metamorphic rocks composed of only one mineral with equidimensional crystals is called a granular texture. This texture indicates that the mineral grains have crystallized under conditions where there was no preferred orientation of the crystals.
The mineral you are referring to is likely known as "opal." Opal is a hydrated amorphous form of silica, characterized by its milky white appearance and iridescent colors when exposed to light. It is commonly used in jewelry due to its unique beauty and play of colors.
Neither. Opal is a mineraloid, as it does not have a sufficiently organized structure to be considered a mineral.
Opal
Opal ia a hydrated silica mineral.
Opal is a mineral.
Opal and amber are not minerals.
Opal and amber are not minerals.
The fracture of an opal can be hard or smooth , An opal can have as many fractures as any other mineral can . Sometimes opal can be smooth , sometimes they can be hard . The fracture of an opal is hard and smooth .
Opal is a valuable mineral that starts with the letter "O." It is known for its unique play of colors and is often used in jewelry.
Orthoclase
No. As it is synthetic it is man-made. A mineral must be naturally occurring and have a crystalline structure (among other requirements). Synthetic opal does not meet these criteria.
Opals are actually not minerals, but are classed as mineraloids. This is because they lack a crystalline structure, yet are mineral in nature.
The way a rock or mineral feels is known as its texture. Texture describes the physical characteristics such as smoothness, roughness, or graininess of a rock or mineral when touched.