jewel
With the jewel (one cough), it is the stone in a mineral and says a thing having the appearance that rarity is beautiful highly or the mineral which is generally used for accessories.
Generally it points at an inorganic crystal as the mineral, but there is the thing which is organic matter like a thing and amber doing it to a creature like coral and a pearl in the origin.
In the old Chinese food civilization zone, I called such a stone a ball, but jade was representative in that.
It is important that the hardness is high in the one of the conditions of the jewel.
This is so that admiration value is lost for weathering / deterioration by the cloud of dust (quartz distributed unevenly in environment) by the aging in the case of the mineral that the hardness is low.
As for the diamond, Mohs scale 10, ruby sapphire are Mohs scale 9 as an example.
The Mohs scale of the quartz is 7 and it wants to be careful to the hardness of these jewels being higher than it of the quartz (the opal has low hardness exceptionally).
A property to satisfy desires of value / the possession of value / the property of the appreciation such as a color, transparency, rarity as a condition except the hardness is important.
In addition, it is the metal in a mineral and says the thing which rarity is high, and a secular variation by a chemical reaction or the weathering is remarkable, and is low with a noble metal.
Money, platinum fall.
It is often that it is named by the place name, Greek.
Generally it points at an inorganic crystal as the mineral, but there is the thing which is organic matter like a thing and amber doing it to a creature like coral and a pearl in the origin.
In the old Chinese food civilization zone, I called such a stone a ball, but jade was representative in that.
It is important that the hardness is high in the one of the conditions of the jewel.
This is so that admiration value is lost for weathering / deterioration by the cloud of dust (quartz distributed unevenly in environment) by the aging in the case of the mineral that the hardness is low.
As for the diamond, Mohs scale 10, ruby sapphire are Mohs scale 9 as an example.
The Mohs scale of the quartz is 7 and it wants to be careful to the hardness of these jewels being higher than it of the quartz (the opal has low hardness exceptionally).
A property to satisfy desires of value / the possession of value / the property of the appreciation such as a color, transparency, rarity as a condition except the hardness is important.
In addition, it is the metal in a mineral and says the thing which rarity is high, and a secular variation by a chemical reaction or the weathering is remarkable, and is low with a noble metal.
Money, platinum fall.
It is often that it is named by the place name, Greek.