Search results
Results from the WOW.Com Content Network
The ideal grade, called "Deep Siberian", has a primary purple hue of around 75–80%, with 15–20% blue and (depending on the light source) red secondary hues. " Rose de France" is defined by its markedly light shade of the purple , reminiscent of a lavender / lilac shade.
Diamonds occur in a variety of colors—steel gray, white, blue, yellow, orange, red, green, pink to purple, brown, and black. [2] [3] Colored diamonds contain interstitial impurities or structural defects that cause the coloration; pure diamonds are perfectly transparent and colorless.
Present, dichroism or trichroism, depending on heat treatment. Tanzanite is the blue and violet variety of the mineral zoisite (a calcium aluminium hydroxyl sorosilicate ), caused by small amounts of vanadium. [3] Tanzanite belongs to the epidote mineral group. Tanzanite is only found in Simanjiro District of Manyara Region in Tanzania, in a ...
Properties. Charoite is translucent lavender to purple in color with a pearly luster. Charoite is strictly massive in nature, and fractures are conchoidal. It has an unusual swirling, fibrous appearance, sometimes chatoyant, and that, along with its intense color, can lead many to believe at first that it is synthetic or enhanced artificially.
The five traditional cardinal gems are: amethyst (purple) – Rare and precious in the Old World until large deposits were found in Brazil. diamond (transparent) emerald (green) ruby (red) sapphire (blue)
Lapis armenus – Precious stone resembling lapis lazuli; Sar-i Sang – town in Badakhshan Province, Afghanistan; Shades of blue – Variety of the color blue; Ultramarine – Deep blue purple color pigment which was originally made with ground lapis lazuli; References
It is used as a gemstone in jewelry and other adornments. Common topaz in its natural state is colorless, though trace element impurities can make it pale blue or golden brown to yellow-orange. [7] Topaz is often treated with heat or radiation to make it a deep blue, reddish-orange, pale green, pink, or purple.
Goldstone glass under magnification. Goldstone is a type of glittering glass made in a low- oxygen reducing atmosphere. The finished product can take a smooth polish and be carved into beads, figurines, or other artifacts suitable for semiprecious stone, and in fact goldstone is often mistaken for or misrepresented as a natural material.
Jade is classified into three main types: Type A, Type B, and Type C. Type A jade refers to natural, untreated jadeite jade, prized for its purity and vibrant colors. [4] It is the most valuable and sought-after type, often characterized by its vivid green hues and high translucency.
Color: banded: Crystal habit: Cryptocrystalline silica: Cleavage: None: Fracture: Conchoidal, with very sharp edges: Mohs scale hardness: 6.5–7: Luster: Waxy: Streak: White: Diaphaneity: Translucent: Specific gravity: 2.58–2.64: Refractive index: 1.530–1.540: Birefringence: up to +0.004 (B-G) Pleochroism: Absent