BeautifulAmmonite fossil coming from Madagascar. -35%

BeautifulAmmonite fossil coming from Madagascar. -35%

Tourmalines in sales - presentation box (160x125 mm)

Tourmalines in sales - presentation box (160x125 mm)

SALE 2021: Beautiful garnet crystals coming from Mali 50% OFF

Naturally occurring crystals. Wonderful and many pieces in a kilo.
Availability: In stock
SKU
714
  • Buy 1000 for €0.11 each and save 27%
SALE 2021: Beautiful garnet crystals coming from Mali 50% OFF is available to buy in increments of 250

The garnet group comprises minerals of a cubic crystal system, and crystals in the form of rhombic dodecahedrons and trapezoëders. The nesosilicaten are of the general formula A3B2 (SiO4) 3. Shells may contain the chemical elements calcium, magnesium, aluminum, Iron2 +, + ijzer3, chromium, manganese and titanium. Grenades show no cleavage. The hardness is from 6.5 to 7.5, and shells can be transparent to opaque. The name "garnet" comes from the Latin word granatus, and refers to malum garanatum (pomegranate) is a plant with red seeds resembling found on many garnet crystals. Garnets are contrary to what is commonly believed, and the name suggests, is not always red, but may purple, red, orange, yellow, green, brown, black or colorless. In 1998 Bekily, Madagascar, for the first time found a blue-pink garnet. This variant is considered very rare. The six most common variants are pyrope, almandine, spessartiet, grossular, uvarovite and andra diet. These occur in two solid solution series: 1.De pyralspiet Group: pyrope-almandine-spessartiet 2.De ugrandiet group: uvarovite-grossular-andra diet. Grenades are very common in the lower crust and mantle, thus playing a major role in chemical understanding of the Earth. The grenade is one of the "nine gems" in Thai Order of the Nine Gems.

 
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