Moonstone, also known as the "moonstone" in people's mouth, is called moonstone because of its "moonlight effect" (the blue or bright white halo of the moonlight appears in the center of the gem). Opal is one of the world's most precious gemstones. Its resources are scarce and there are not many places in the world. Among them, the more famous place of origin is Sri Lanka, so the price is relatively expensive.
Characteristics of opal and moonstone
The composition of ice feldspar and albite in moonstone is more common. The good quality moonstone is translucent and has a blue light like a wave. Poorly turbid. The lower level only has a halo and no blue light. When viewed from a certain angle, there is a luminous effect, which has a hardness of 6, a density of 2.55-2.61 g/cm3, a brittleness, a refractive index of 1.520-2.525, and a glass luster. Observed under the microscope, the special moonstone has a foot-like inclusion.
The color of the opal face and the back surface of the opal are not the same. When you look closely, you can see that they have obvious differences in color. The opal has a light band. When the opal is turned, the band will change position. In the case of two-way light source illumination, the cat's eye will also have a change in opening and closing.
The role of opal and moonstone
Legend has it that in the full moon, wearing moonstone can meet good lovers; therefore, moonstone is called "Lover Stone", a symbol of friendship and love, and a good gift for love. In the United States, the Indians regard the moonstone as a "sacred stone" and a commemorative gem for the thirteenth anniversary of marriage. For girls, long-term wear of moonstone can improve temperament from the inside out, making the manner elegant and calm. At the same time, the moonstone is also the birthstone of June, symbolizing health, wealth and longevity.
Opal is often considered a symbol of good luck, and it is believed that it will protect the owner's health and longevity from poverty. Together with the stone, it belongs to one of the world's five precious high-end gemstones. It can activate cells, accelerate the body's metabolism, have a good cosmetic effect, enhance memory, and also enhance immunity. The opal also symbolizes courage and strength. In the East, it is often used as a talisman to avoid evil. It is a body stone that is not invaded by external forces.
How to distinguish between opal and moonstone
In the center of the gem, there is a blue or bright white faint moonlight, which is a moonstone. The opal shows the same light phenomenon as the cat's eyes. It is flexible and bright, and can change with the intensity of light. The moonlight's faintness is extremely special. When turning a gemstone, it tends to move in a sheet shape, while the quartz cat's eye shows a linear movement of the eyeliner. Opal changes with the intensity of light.
The hardness of the opal is about 8.5, the hardness of the moonstone is between 6-6.5, the density of the opal is 3.71-3.75 g/cm3, and the density of the moonlight is about 2.68 g/cm3, so the same volume of gemstones, The weight of the opal is heavier than the weight of the moonstone.
There are sometimes "100-footed" inclusions inside the moonstone, but the opal does not.
Moonstone has obvious cleavage, and a jagged fracture can be seen at some tiny sections, while the opal is a shell-like fracture.
Which is good for opal and moonstone?
Opal is a rare and precious variety in jewelry. The world's production is very low, and it is one of the world's five rare gemstones. Moonstone has relatively more production, so the price of opal is more expensive.
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