Rocks and Minerals

Albite (1)

White to gray, blueish, greenish, reddish; may be chatoyant hardness: 6-6.5 Albite almost always exhibits crystal twinning often as minute parallel striations on the crystal face. colors: White to gray, blueish, greenish, reddish; may be chatoyant crystals are triclinic

Biotite (11)

Biotite is a name used for a large group of black mica minerals It is a black mica with perfect cleavage and a vitreous luster on the cleavage faces. colors: Black, dark green, dark brown hardness: 2.5-3

Chalcedony (43)

Chalcedony is composed of very fine intergrowths of quartz and moganite Chalcedony has a waxy luster, and may be semitransparent or translucent colors: It can assume a wide range of colors, but those most commonly seen are white to gray, grayish-blue or a shade of brown ranging from pale to nearly black. streak: white hardness: 6-7

Citrine (44)

Citrine is a variety of the mineral quartz hardness: 7 color: Yellow, yellow-brown, orange, dark orange-brown, reddish-brown Most often as protruding clusters of pyramids on a geode base. Also occurs as short, stubby, terminated crystals, either singular or in drusy aggregates, and occasionally as long prismatic crystals and groupings. Also occurs massive and crusty. Citrine is transparent to translucent

Crystal (45)

Crystals are commonly recognized by their shape, consisting of flat faces with sharp angles. crystals are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions. colors: may vary

Sodalite (51)

Sodalite is a royal blue mineral Massive sodalite samples are opaque, crystals are usually transparent to translucent. colors: usually known for its royal blue

Rhodonite (49)

rhodonite crystals often have a thick tabular habit, but are rare hardness: 5.5-6.5 colors: Rose-pink to brownish red, gray, or yellow crystal: Tabular crystals, massive, granular streak: white

Amazonite/Microcline (3)

streak: white hardness: 6 color: White, cream, light yellow, light brown, reddish-brown, pink, light blue, blue-green, green, deep green. Sometimes multicolored with alternating green and white color. May also exhibit a color sheen known as adularescence. Usually in well formed crystals, can reach up to enormous size

Opal (39)

white and green opals are the most common. Opals vary in optical density from opaque to semitransparent. colors: colorless, white, yellow, red, orange, green, brown, black, blue, pink crystal habit: Irregular veins, in masses, in nodules hardness: 5.5-6 streak: white

Olivine (38)

Olivines are usually green in colorant it can be transparent to translucent colors: yellow-green, greenish yellow, or brown

Agate/Onyx (41)

Agate and onyx are both varieties of layered chalcedony that differ only in the form of the bands: agate has curved bands and onyx has parallel bands. color: can be any, mainly dark colors and black streak: white hardness: 6.5-7

Hornblende (32)

Hornblende has a hardness of 5-6 colors: opaque green, greenish-brown, brown or black color Hornblende is a common constituent of many igneous and metamorphic rocks

Muscovite (37)

It has a highly perfect basal cleavage yielding remarkably thin laminae (sheets) which are often highly elastic colors: White, grey, silvery streak: white hardness: 2-2.25 It can be colorless or tinted through grays, browns, greens, yellows, or (rarely) violet or red, and can be transparent or translucent. looks like sheets of something silver stacked together

Kaolinite (33)

It is a soft, earthy, usually white, clay mineral usually with a soft consistency and earthy texture and can be easily broken colors: White, gray, yellow, beige, darker colored brown, orange, or reddish-brown

Amethyst (42)

It is one of several forms of quartz. The hardness of the mineral is the same as quartz There is usually somewhat large crystals with a normal habit streak: white colors: Purple, violet hardness: 7-lower in impure varieties

Jasper (46)

Jasper is an opaque, impure variety of silica colors: usually red, yellow, brown or green in color; and rarely blue The mineral aggregate breaks with a smooth surface Jasper is an opaque rock of virtually any color

Tremolite (58)

Pure magnesium tremolite is creamy white, but the color grades to dark green with increasing iron content. color: White, gray, lavender to pink, light green, light yellow Hardness: 5-6 The material is toxic and is fibrous

Staurolite (53)

Staurolite is a red brown to black, mostly opaque, nesosilicate mineral with a white streak and it crystallizes in the monoclinic crystal system

Talc (55)

Talc is a clay mineral It occurs as foliated to fibrous masses, and in an exceptionally rare crystal form Its color ranges from white to grey or green and it has a distinctly greasy feel. Its streak is white.

Topaz (56)

Topaz is a silicate mineral of aluminium and fluorine Topaz crystallizes in the orthorhombic system, and its crystals are mostly prismatic terminated by pyramidal and other faces colors: colorless (if no impurities), blue, brown, orange, gray, yellow, green, pink and reddish pink

Tourmaline Group (57)

Tourmaline is not a single mineral, but a group of several closely related minerals. The three most well-known members are Elbaite, Schorl, and Dravite. colors: black, brown, green, red, pink, blue, and gray. White, colorless, yellow, orange, and purple colors are less common. Crystals are frequently multicolored, containing two or more distinct colors.

Rose Quartz (48)

Transparency: Translucent, Transparent colors: pink hardnes: 7

Lepidolite (34)

color: Pink, purple, rose-red, violet-gray, yellowish, white, colorless hardness: 2.5-3 streak: white the crystal habit is scaly aggregates and massive

Almandine (2)

color: reddish orange to red, slightly purplish red to reddish purple and usually dark in tone strek: white hardness: 7-7.5 It is frequently cut with a convex face

Milky Quartz (47)

color: various shades of white, usually milky. hardness: 7 Milky Quartz is quartz crystal or cluster The cloudy white character of the crystals is what lead to the variety name, milky

Beryl (10)

colors (if tinted with impurities, pure beryl is colorless): red, white, green, blue, yellow size: can be up to several meters

Augite (6)

colors: Black, brown, greenish, violet-brown; in thin section, colorless to gray with zoning common hardness: 5.5-6 streak: greenish-white Occasional specimens have a shiny appearance

Orthoclase/Microcline (21)

colors: White, grey, greyish yellow, yellowish, tan, salmon-pink, bluish green, green, clear hardness: 6-6.5 streak: white generally characterized by cross-hatch twinning

Epidote (20)

colors: Yellowish-green, green, brownish-green, black It occurs in monoclinic crystals in pegmatites In these rocks, epidote is often associated with amphiboles, feldspars, quartz, and chlorite.