Appearance Similar to other tourmalines, rubellites form crystals in the trigonal structural system. When cut and polished, its distinctive prismatic crystals can show a variety of aspects. Rubellites are medium- to dark-toned tourmalines with relatively rich dark pink to red colors. Geographical Distribution Numerous geological environments are home to tourmaline, including rubellite, which is frequently […]
Appearance One type of chalcedony, a microcrystalline quartz variant, is fire agate. Its vivid, iridescent colors are a result of the thin layers of iron oxide and other minerals that are present. There are many different colors of fire agates, such as red, orange, yellow, green, blue, and purple. Fire agates, like chalcedony, are members
Appearance Since demantoids are the green variant of andradite garnet, they are inherently always green, however the precise shade can vary from a harsh yellowish green to almost the exact shade of a fine emerald. Iron is the reason for the brownish hue in some stones. Because of its very high dispersion (0.057), “fire”—rainbow-colored flashes
Appearance The most distinctive physical characteristic of Blue Aventurine is, as its name suggests, blue in color. The blue can range in tone from a deep and rich azure to a faint, nearly translucent blue. Though there may be some variances, the color of the stone is usually consistent throughout. One form of quartz with
Appearance It frequently forms prismatic crystals with a characteristic bladed habit when it crystallizes in the triclinic system. The mineral’s shiny sheen enhances its visual appeal. Its normal color is brown to golden-brown. Geographical Distribution It frequently forms prismatic crystals with a characteristic bladed habit when it crystallizes in the triclinic system. The mineral’s shiny
Appearance A valuable gemstone, yellow sapphire can have hues ranging from light lemon yellow to rich canary yellow. The most desirable yellow sapphires are those with a vibrant and saturated hue, though the strength and tone of yellow can vary. This gemstone is prized for its rarity, beauty, and durability (it has a Mohs hardness
Appearance Vivianite is primarily recognized for its deep blue to blue-green color, which can vary in strength. When it weathers or becomes dehydrated, it can also seem colorless, white, grey, or yellowish. Depending on the crystal structure and the particular environmental conditions in which it occurs, the luster of vivianite can range from vitreous to
Appearance Typical colors of vanadinite include bright red, orange-red, and brownish-red. One of its most characteristic colors is its vibrant crimson. It has a bright, occasionally slightly greasy appearance due to its resinous to sub-adamantine luster. Typically transparent to translucent, vanadinite crystals let some light through. Vanadinite forms hexagonal prismatic or barrel-shaped crystals when it
Appearance Uvarovite is well known for having a rich, emerald-green hue. The main reason for the green coloration is the chromium content of its crystal structure. The hue can vary from a bright green to a tint that is somewhat yellowish or bluish-green. The isometric crystal system is where uvarovite crystallizes. Its crystals frequently form
Appearance The primary characteristic that sets tsavorite apart is its color. Though tsavorite is sometimes likened to emeralds in terms of color, tsavorite typically has a more vivid and intense green tint. The hue can range from yellowish-green to bluish-green, depending on the trace elements that are present. Because tsavorite is usually transparent, light may