First, "agate" and "tourmaline"-the elements are different.
1, "agate" is a timely substance, which is formed by the gradual precipitation of colloidal solution containing sand acid on the crust surface. It is a banded block mixed with opal and aphanitic, with hardness of 6.5-7 degrees and specific gravity of 2.65, and its color is quite layered. Translucent or opaque. The primitive form of tripartite crystal system.
2. "Tourmaline", also known as tourmaline, is a kind of gem-grade tourmaline and an extremely complex boroaluminosilicate, which may contain one or more elements such as magnesium, sodium, lithium, chromium, copper and potassium.
Second, "agate" and "tourmaline"-different appearance colors
1, "agate" is mostly layered, and each layer overlaps with each other to form a corrugated shape, which is waxy and slightly transparent or opaque. The colors of agate are mainly green, purple, red, white, light blue, brown and black. In addition, some agates have colorful effects, and many colors are intertwined to form some unique and novel patterns.
2. "Tourmaline" is the most colorful gem, with 15 colors, mainly colorless, rose red, pink, red, blue, green, yellow, brown and black. Among them, the top grade is transparent and shiny blue, fresh rose red and pink plus green composite color. Tourmaline is rich in color, changeable and transparent.
Third, "agate" and "tourmaline"-different brightness
1, "agate" is translucent or opaque, and the transparency of real agate is slightly disordered, which is warm in winter and cool in summer. Natural red agate has distinct colors and obvious stripes. If you look closely, you can see tiny red dots densely arranged on the red belt.
2. Tourmaline is more transparent than agate. The more transparent it is like glass, the higher its value, and the crystal clear tourmaline has the highest price. Tourmaline crystals are rich in gas-liquid inclusions, which are often distributed directionally to form tubular inclusions. There is an obvious bright band on the surface of tourmaline, and the bright band changes with different observation angles.
References:
Baidu encyclopedia-agate stone
References:
Baidu encyclopedia-bixishi