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gypsum in the class of sulfates used in plaster, wallboard, some cements, fertilizer, paint filler, ornamental stones, etc. its chemistry is hydrated calcium sulfate. gypsum is one of the more common material in sedimentary envirnment 

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gypsum in the class of sulfates used in plaster, wallboard, some cements, fertilizer, paint filler, ornamental stones, etc. its chemistry is hydrated calcium sulfate. gypsum is one of the more common material in sedimentary envirnment 

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Hardystonite is from the group of Melilite, it's Chemistry is Calcium, Zinc, and SIlicate. It's class is SIlicate and it's uses are minor ores of Zinc and as mineral specimens.  Hardystonite is well known to collectors of fluorescence minerals.  The fluoresce is a dark purple under short-wave ultraviolet light.  The fluorescent color is in striking contrast to the normal color of hardystonite.  Fluorescences occurs when the ultraviolet light imparts engery to some of the atoms in the mineral.  Hardystonite is usually a dull, unattractive white, but under short-wave UV light it impresses. The mineral are sometimes found in association with each other and can make wonderful colors of fluorescent specimens. 

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Hardystonite is from the group of Melilite, it's Chemistry is Calcium, Zinc, and SIlicate. It's class is SIlicate and it's uses are minor ores of Zinc and as mineral specimens.  Hardystonite is well known to collectors of fluorescence minerals.  The fluoresce is a dark purple under short-wave ultraviolet light.  The fluorescent color is in striking contrast to the normal color of hardystonite.  Fluorescences occurs when the ultraviolet light imparts engery to some of the atoms in the mineral.  Hardystonite is usually a dull, unattractive white, but under short-wave UV light it impresses. The mineral are sometimes found in association with each other and can make wonderful colors of fluorescent specimens. 

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Na4(Al, Si)12O24Cl to Ca4(Si, Al)12O24(CO3, SO4)

forms in metamorphic rocks
commonly white, colorless, greenish or gray but also yellow, brown, reddish, pink, violet or blue colors
nonmetallic
transparent crystals
fracture
hardness 5.5-6
white streak

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Calcium carbonate
used in cement and  mortars
has many colors

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Colors are various. Luster is dull. Cleavage is not seen.Hardness is approximately 2. Streak is pale yellow.

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Benitoite typically blue but also colorless and yellowish.  The Luster is vitreous and nearly all specimens fluoresce blue under uv light. The minerals associated are serpentine , neptunite , natrolite , joaquimite , sanbornite , taramellite , albite , and fresnoite. The cleavage is absent , and the fracture is irregular but hardness is 6 - 6.5 . The streak is white. 

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Benitoite typically blue but also colorless and yellowish.  The Luster is vitreous and nearly all specimens fluoresce blue under uv light. The minerals associated are serpentine , neptunite , natrolite , joaquimite , sanbornite , taramellite , albite , and fresnoite. The cleavage is absent , and the fracture is irregular but hardness is 6 - 6.5 . The streak is white. 

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Chemical formula:
Na8Al6Si6O24Cl2
Family: Silicates
Crystal system: isometric
Color: Bright-blue
Streak: White
hardness: 5.5-6
Luster: Vitreous to greasy
There's cleavage
Creamy white fluorescent, yellow, or orange color in shortwave ultraviolet light.

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- large variety of colors
- purple is the most popular color for fluorite
- well known for its glassy luster
- frequently fluorescence
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- Colorless/ Could vary
-Cleavage
- Luster = Glassy
- Streak= white
- Hardness 4.5
- Fluorescent =  short UV~ bright bluish white

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Chemistry - Zn2SiO4, Zinc Silicates
Class - Silicates
Subclass - Nesosilicates
Group - Phenakite
Uses - A minor ore of zinc and mineral specimens

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~Compound: Zn2AsO4(OH)

~Color: Typically Green
~Cleavage/Fracture: Cleavage
~Hardness: 3.5
~Streak: White to Pale Green
~Fluoresces: Strongly Green
~Transparency: Crystals are transparent to translucent

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https://padlet.com/kstankunas/mkgdchktrspc

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Go here: you and your partner pick a mineral and tell all about it!

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Well, fluorescence is not a common phenomenon being found in only certain minerals. If two minerals are similar and yet one is listed as a possible fluorescent mineral, a fluorescence test could prove important. However if an unknown mineral does not fluoresce, it should not so quickly be dismissed as not being the suspected fluorescing mineral, unless that mineral is reported to always fluoresce.