Gemstones
What distinguishes gemstones is their color, luster, transparency, and what gives them a greater price is their scarcity, and how to extract them, which increases their value, and their hardness and resistance to scratch may affect their physical value as well.
Gemstones
Sapphire
Sapphire is one of the most expensive stones in the world. It belongs to the corundum metal, which is made of aluminum oxide. It is available in red, brown, red, or purple.
Diamond
Diamond occupies second place after sapphire in importance, and consists of carbon due to exposure to high temperature and pressure, and is characterized by the purity of white or transparent, and has many physical properties, the most difficult and hardness.
Emerald
Emerald occupies the third place of importance – beryllium, beryllium silicate and aluminum – found in hard rock mines and marble, unlike most precious stones, and is characterized by its dark green color.
Exhale
Exhalation is a type of blue corundum metal, formed by heat and extreme pressure, and is known as sapphire blue and also in the name of sapphires or saffir, and it is in all colors except red, blue and transparent blue and occupies the fourth place in importance.
Agate
Agate is a dull, non-amorphous, amorphous and usually red color, sometimes yellow, green, blue or gray, a kind of quartz known as jade.
The Yemeni Agate
Onyx is a semi-transparent metal that is chemically synthesized from silica. Crystalline silica contains impurities of iron compounds. These impurities appear in its different colors red, yellow, and brown. The most famous types are the red Yemeni agate known as the armani.
Amethyst
Amethyst is a transparent metal, popularly known as oriental sapphire, light purple, dark or magenta. Violet is acquired by the presence of traces of manganese in its composition. The original amethyst is a type of quartz, made up of silicon dioxide.
Turquoise
Turquoise is known since ancient times, blue green or grayish green and sometimes turns into light green, and is rare in the case of crystallized, where it is composed of aluminum phosphate that contains copper water.
Topaz
Topaz is known as the yellow or yellow sapphire, a transparent metal mainly yellowish in color, but there are blue, brown or yellow types, whose crystals are formed within the cavities of rough granite and chis.
lapis lazuli
The lazuli was known as the geek, a semi-transparent and opaque stone, deep dark blue, with a double chemical composition of aluminum silicate and sodium mixed with iron and sulfur.
opal
Opal is a semi-transparent gemstone with numerous colors, including blue, white, rare black, Portuguese red, green and yellow, with a full gloss.