What is special about willemite?
Willemite is one of the most well-known fluorescent minerals, and its fame is attributed to the Franklin District of New Jersey where it forms in abundance with many different colors and habits. Willemite was named in honor of King William I of the Netherlands (1772 – 1843), who was known locally as King Willem.
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Where can willemite be found?
It occurs in many places, but is best known from Arizona and the zinc, iron, manganese deposits at Franklin and Sterling Hill Mines in New Jersey.
What color is Zincite?
zincite, mineral consisting of zinc oxide (ZnO), usually found in platy or granular masses. Its blood-red colour and orange-yellow streak are characteristic, as is also its common association with black franklinite and white calcite.
Where is franklinite found?
Franklin, New Jersey
Franklinite is named after the locality of Franklin, New Jersey, where it is found. To date, this mineral is found only at Franklin and neighboring Ogdensburg, New Jersey. There are no other localities for Franklinite, but at these two localities it is quite abundant.
How do I identify a willemite?
Identifying Characteristics
Willemites have intense green to yellow-green fluorescence under both shortwave (SW) and longwave (LW) ultraviolet light. Sometimes, they also show intense green phosphorescence. Very rarely, non-fluorescent willemites may occur. Some willemites may display a weak cat’s eye effect.
What is the hardness of willemite?
With a mineral hardness score of only 5.5 out of 10, willemite is very difficult to cut and polish due to its softness and fragility.
How much does zincite cost?
Zincite Price & Value
Natural faceted zincite gemstones are $40-$65 per carat at wholesale, whereas synthetic faceted zincites are around $10 per carat. Zincite cabochons (not mixed) are around $23 per carat.
What is the mineral zincite used for?
Both natural and synthetic zincite crystals are significant for their early use as semiconductor crystal detectors in the early development of crystal radios before the advent of vacuum tubes.
Is franklinite magnetic?
franklinite (zinc iron oxide, ZnFe2O4), jacobsite (manganese iron oxide, MnFe2O4), and trevorite (nickel iron oxide, NiFe2O4). All are magnetic, although franklinite and jacobsite are only weakly so; magnetite, which frequently has distinct north and south poles, has been known for this property since about 500…
How do you identify franklinite?
Physical Properties of FrankliniteHide
- Metallic, Sub-Metallic.
- Opaque.
- Colour: Black.
- Streak: Reddish brown to black.
- 5½ – 6 on Mohs scale.
- Hardness: VHN100=852 – 882 kg/mm2 – Vickers.
- Tenacity: Very brittle.
- Cleavage: None Observed.
What gem glows green under UV light?
Fluorite glows under UV light. The fluorescence phenomenon is named after fluorite, where it was first observed by George Gabriel Stokes in 1852. Fluorite can glow in a variety of colors, but most often, it occurs in vibrant blue or green color under UV light.
How do I identify a Willemite?
What is the mineral barite used for?
Barite that is used as an aggregate in a “heavy” cement is crushed and screened to a uniform size. Most barite is ground to a small, uniform size before it is used as a filler or extender, an addition to industrial products, or a weighting agent in petroleum well drilling mud specification barite.
What type of rock is zincite?
Oxide mineral
| Zincite | |
|---|---|
| Category | Oxide mineral |
| Formula (repeating unit) | (Zn,Mn)O |
| IMA symbol | Znc |
| Strunz classification | 4.AB.20 |
What is the meaning of zincite?
zincite in American English
(ˈzɪŋkait) noun. a brittle, deep-red to orange-yellow mineral, native zinc oxide, ZnO, usually massive or granular: formerly an important ore of zinc. Also called: red oxide of zinc. [1850–55; zinc + -ite1]
How do you make zincite?
Zinc acetate can be prepared by adding zinc metal or zinc oxide to acetic acid. Vinegar can also be used as cheap source acetic acid. After all the zinc has dissolved, the solution is concentrated and cooled to crystallize solid zinc acetate dihydrate.
What is Franklinite used for?
THE MINERAL FRANKLINITE
Franklinite is one of the minerals found at Franklin, New Jersey, a world famous locality that has produced many formerly unknown and exotic mineral species. It is found in large enough quantity to serve as a ore of zinc and manganese, two important strategic and industrial metals.
Is Franklinite a mineral or rock?
Franklinite is an oxide mineral belonging to the normal spinel subgroup’s iron (Fe) series, with the formula ZnFe3+2O4.
What is franklinite used for?
What color do diamonds glow under a blacklight?
blue glow
A pure and natural diamond is known to produce a blue glow when exposed to black light. The impure ones have certain chemical impurities that trigger the glow of other colors like green, white, red, and yellow when diamonds are exposed to ultraviolet light.
What gem glows purple under UV light?
Fluorite typically glows a blue-violet color under shortwave and longwave light. Some specimens are known to glow a cream or white color. Many specimens do not fluoresce.
Is barite rare or common?
Barite (also spelled Baryte) is a fairly common mineral but somewhat rare as a gemstone because clean, facet grade crystals are difficult to find. Barite (BaSO4) is the most common barium mineral and is the barium analog of Celestine (Celestite) (SrSO4).
Where is barite commonly found?
Major deposits in the United States have been found in Georgia, Missouri, Nevada and Tennessee. In Canada, the mineral has been mined in the Yukon Territory, Nova Scotia and Newfoundland. In Mexico, barite deposits have been discovered in Hermosillo, Pueblo, Monterrey and Durango.
What is the hardness of zincite?
4
| Zincite | |
|---|---|
| Tenacity | Brittle |
| Mohs scale hardness | 4 |
| Luster | Subadamantine to resinous |
| Streak | Yellowish orange |
Is zincite real?
Zincite is a very rare mineral. It’s also difficult to cut, which makes faceted zincite one of the rarest of all gems. However, “accidental synthetics” (industrial by-products) have entered the gem trade in far greater quantities than their natural counterparts.