STUDY OF VARIOUS ROCK MINERALS

1	NAME	PYRITE
2	CRYSTAL SYSTEM	Isometric
3	COLOUR	Pale brass yellow
4	FORM AND HABIT	Druse,Stalactitic,Striated
5	STREAK	greenish black
6	CLEAVAGE	Poor
7	LUSTRE	Metallic
8	TRANSPARENCY	Opaque
9	FRACTURE	Conchoidal
10	HARDNESS	6.5
11	SPECIFIC GRAVITY	4.95
12	COMPOSITION	Iron sulfide, sometimes containing small amounts of cobalt, nickel, silver, and gold
13	VARIETY	Cathedral Pyrite,Dollar, Pyrite Cube
14	ENVIRONMENT	It usually forms in all types of environment
15	USES	It is used as an ornamental stone. It is sometimes used as gemstone by being faceted and polished for use as an inexpensive side gemstone in some rings, necklaces, and bracelets.
16	MAGNETISM	Magnetic after heating
17	RADIOACTIVITY	Not Radioactive

1	NAME	Quartz
2	CRYSTAL SYSTEM	Hexagonal
3	COLOUR	Colorless, white, purple, pink, brown, and black. Also gray, green, orange, yellow, blue, and red.
4	FORM AND HABIT	Crystalline
5	STREAK	White
6	CLEAVAGE	Indiscernible. Seldom exhibits parting
7	LUSTRE	Vitreous
8	TRANSPARENCY	Transparent to opaque
9	FRACTURE	Conchoidal
10	HARDNESS	7
11	SPECIFIC GRAVITY	2.6 - 2.7
12	COMPOSITION	Silicon dioxide
13	VARIETY	Amethyst,Aqua Aura,Blue Quartz, Cactus Quartz,Morion
14	ENVIRONMENT	Quartz occurs in almost every single mineral environment
15	USES	Manufacture of glass,silicon semiconductors are made from Quartz,electronic uses,
16	MAGNETISM	Diamagnetism
17	RADIOACTIVITY	Not Radioactive

1	NAME	Calcite
2	CRYSTAL SYSTEM	Trigonal
3	COLOUR	Usually white but also colorless, gray, red, green, blue, yellow, brown, orange
4	FORM AND HABIT	Trigonal,Crystal
5	STREAK	White
6	CLEAVAGE	Perfect, rhombohedral, three directions
7	LUSTRE	Vitreous
8	TRANSPARENCY	Transparent, Translucent
9	FRACTURE	Conchoidal
10	HARDNESS	3
11	SPECIFIC GRAVITY	2.7
12	COMPOSITION	CaCO3
13	VARIETY	Agaric Mineral,Aphrite,Corn Spar and etc.,
14	ENVIRONMENT	Calcite is a constituent of all mineral environment
15	USES	Acid neutralization, a low-hardness abrasive, soil conditioner, heated for the production of lime
16	SOLUBILITY	Soluble in dilute acids
17	RADIOACTIVITY	Not Radioactive

1	NAME	Apophyllite
2	CRYSTAL SYSTEM	Tetragonal
3	COLOUR	Colorless, white, gray, green, brown. Rarely pink, purple, red, or orange.
4	FORM AND HABIT	‎Prismatic, tabular
5	STREAK	White
6	CLEAVAGE	Perfect
7	LUSTRE	Vitreous to greasy
8	TRANSPARENCY	Transparent to Translucent
9	FRACTURE	Uneven
10	HARDNESS	4.5-5
11	SPECIFIC GRAVITY	2.3 - 2.4
12	COMPOSITION	Hydrous calcium potassium fluoro-hydroxyl-silicate
13	VARIETY	Chromocylite
14	ENVIRONMENT	Mostly in Volcanic rock, within Basalt and in seams in diabase
15	USES	Colored crystals of Apophyllite such as green and red are highly desired by collectors.
16	TENACITY	Brittle
17	RADIOACTIVITY	Barely Detectable

1	NAME	Heulandite
2	CRYSTAL SYSTEM	Monoclinic
3	COLOUR	White, colorless, beige, light yellow, brown, pink, and gray. Less commonly green, red, burgundy, orange, or black
4	FORM AND HABIT	Tabular
5	STREAK	Colorless
6	CLEAVAGE	‎Perfect Basal
7	LUSTRE	Vitreous, Pearly
8	TRANSPARENCY	Transparent to Translucent
9	FRACTURE	Uneven
10	HARDNESS	3.5 - 4
11	SPECIFIC GRAVITY	2.2
12	COMPOSITION	Hydrous calcium sodium aluminum silicate
13	GROUP	Zeolite
14	ENVIRONMENT	Most often in cavities of volcanic basalt
15	USES	Heulandite as a Zeolite is also used in water purifiers and chemical filters.
16	TENACITY	Brittle
17	RADIOACTIVITY	Barely detectable

1	NAME	Scolecite
2	CRYSTAL SYSTEM	Monoclinic
3	COLOUR	White, colorless, light yellow, light pink. Rarely orange.
4	FORM AND HABIT	Crystal
5	STREAK	Colorless
6	CLEAVAGE	Perfect
7	LUSTRE	Vitreous
8	TRANSPARENCY	Transparent and Translucent
9	FRACTURE	Uneven
10	HARDNESS	5 - 5.5
11	SPECIFIC GRAVITY	2.16-2.4
12	COMPOSITION	Hydrous calcium aluminum silicate
13	ROCK TYPE	Igneous
14	ENVIRONMENT	In cavities of Volcanic Basalt
15	USES	Scolecite specimens are of interest to collectors
16	TENACITY	Brittle
17	RADIOACTIVITY	Not Radioactive

1	NAME	Amethyst
2	CRYSTAL SYSTEM	Hexagonal
3	COLOUR	Light to dark purple
4	FORM AND HABIT	Crystal
5	STREAK	White
6	CLEAVAGE	‎Indiscernible
7	LUSTRE	Vitreous
8	TRANSPARENCY	Transparent to Translucent
9	FRACTURE	Conchoidal
10	HARDNESS	7
11	SPECIFIC GRAVITY	2.6-2.7
12	COMPOSITION	Silicon dioxide
13	VARIETY	Amethyst Quartz,Ametrine,Cactus Quartz
14	ENVIRONMENT	All Mineral environment, especially in igneous environments
15	USES	Amethyst is faceted into jewelry cuts and other ornamental purposes
16	TENACITY	Brittle
17	RADIOACTIVITY	Yes

1	NAME	Mesolite
2	CRYSTAL SYSTEM	Monoclinic
3	COLOUR	White, colorless, off-white, light yellow.
4	FORM AND HABIT	Acicular and Radiating
5	STREAK	Colorless
6	CLEAVAGE	Perfect
7	LUSTRE	Silky
8	TRANSPARENCY	Transparent to Translucent
9	FRACTURE	Uneven
10	HARDNESS	5
11	SPECIFIC GRAVITY	2.3
12	COMPOSITION	Hydrous sodium calcium aluminum silicate
13	ROCK TYPE	Igneous
14	ENVIRONMENT	Cavities of Volcanic Basalt
15	USES	It is a popular zeolite mineral for mineral collectors and zeolite collectors in particular
16	TENACITY	Brittle
17	RADIOACTIVITY	Not Radioactive

1	NAME	Stilbite
2	CRYSTAL SYSTEM	Monoclinic
3	COLOUR	White, beige, peach, pink, orange, light yellow, brown. Less commonly gray, red, or green
4	FORM AND HABIT	Tabular and Flattenned
5	STREAK	Colorless
6	CLEAVAGE	Perfect
7	LUSTRE	Vitreous,Pearly,Dull
8	TRANSPARENCY	Transparent and Translucent
9	FRACTURE	Uneven
10	HARDNESS	3.5-4
11	SPECIFIC GRAVITY	2.1-2.2
12	COMPOSITION	Hydrous calcium sodium aluminum silicate
13	ROCK TYPE	Igneous
14	ENVIRONMENT	Most often in Volcanic Basalt
15	USES	Collection stone and used as water purifier and chemical filters
16	TENACITY	Brittle
17	RADIOACTIVITY	Not Radioactive

1	NAME	Natrolite
2	CRYSTAL SYSTEM	Orthrorombhic
3	COLOUR	White, colorless, off-white, light gray
4	FORM AND HABIT	Acicular and Radiating
5	STREAK	Colorless
6	CLEAVAGE	Perfect
7	LUSTRE	Silky,Vitreous and Pearly
8	TRANSPARENCY	Transparent and Translucent
9	FRACTURE	Uneven
10	HARDNESS	5 - 5.5
11	SPECIFIC GRAVITY	2.2 - 2.3
12	COMPOSITION	Hydrous sodium aluminum silicate
13	ROCK TYPE	Igneous
14	ENVIRONMENT	Most prevalent in cavities of Volcanic Basalt
15	USES	Collection and Ornamental purpose
16	TENACITY	Brittle
17	RADIOACTIVITY	Not Radioactive