Yes, it is perfect in one direction, basal.
Topaz are Insoluble in acids. It has great hardness and perfect basal cleavage. Even though, Topaz jewelry should not be ultrasonically cleaned; the vibration can cause incipient cleavage cracks to open, cleaving the stone. Some treated stones (particularly the expensive reds, pinks, violets and deep oranges, but not blue) are known to fade with prolonged exposure to direct sunlight.
i think ether numbers of letters
the density of the blue topaz is the mass divided by the volume
Cleavage refers to how a mineral breaks and how the atoms are positioned. Cleavage is measured in the following ways: quality of cleavage, the number of sides exhibiting cleavage and the cleavage habit and in the case of a diamond it is all sides.
yellow topaz November Gemstone: Citrine, Yellow Topaz November Birthstone Color: Yellow
Luster of Topaz is Vitreous
you can find blue topaz in Brazil, Sri Lanka, Pakistan and Russia!
Thar marbella stone I think it was called, which is the biggest blue topaz.
it is the Blue Zircon
See this link. Do not believe in the fantastic qualities of topaz !
Cleavage is when a mineral breaks into flat pieces. Fracture is when a mineral breaks into irregular pieces. Topaz atom bonds are weaker in some parts and stronger in others. When it is equally strong then it breaks into irregular pieces and if it all weak in a flat line then it will be flat.
Topaz usually shows up as being a yellow color in it's pure state. Blue topaz appears as blue in it's natural state.