Exploring Franklinite: A Rare Mineral with Remarkable Properties and Unique Products

Franklinite is a rare mineral that is significant in geology and mineralogy. Its unique properties and intriguing history make it a fascinating subject of study.

In this article, we will delve into what Franklinite is, explore its characteristics, discuss its uses, and provide some intriguing information about this remarkable mineral.

What is Franklinite?

Franklinite is a complex oxide mineral composed mainly of zinc, iron, and manganese. Its chemical formula is (Zn, Fe, Mn)(Fe, Mn)_2O_4, indicating its composition of zinc, iron, and manganese oxides. The mineral is named after Franklin, New Jersey, USA, where it was first discovered.

A little history of Franklinite

The discovery of Franklinite can be traced back to the early 19th century. It was first identified in the zinc mines of Franklin, which were among the most productive zinc mines in the world at that time.

The mineral was initially mistaken for magnetite due to its similar appearance, but its distinct properties led to its classification as a separate mineral species.

Characteristics of Franklinite

Franklinite typically occurs as black metallic crystals with a high luster. It has a cubic crystal structure and a Mohs hardness of 5.5-6.5, which indicates its moderate hardness. Its specific gravity ranges from 5.07 to 5.18, making it a relatively dense mineral. It is opaque and does not allow light to pass through it.


Franklinite has several practical applications due to its composition and properties. One of its primary uses is as an ore of zinc, extracted and processed to obtain zinc metal. Additionally, Franklinite can serve as a source of iron and manganese.

At Keycap Quarry, we create Franklinite Keycaps for your mechanical keyboard. These are practically to die for. Beautiful, stylish, and on point!

Other Intriguing Information

Aside from its industrial applications, Franklinite has also gained attention in the realm of collector minerals. Its unique crystal form, metallic luster, and association with other rare minerals make it highly sought after by mineral collectors and enthusiasts. The Franklinite deposits in New Jersey have produced exceptional beauty and quality specimens.

Buy Franklinite Products from Keycap Quarry!

Intrigued? Good!

Keycap Quarry offers an exciting range of products featuring Franklinite. Their collection includes Franklinite keycaps that are uniquely designed and one of a kind. These keycaps add an aesthetic appeal to your keyboard and serve as a conversation starter, showcasing the beauty of this remarkable mineral.

Keycap Quarry also offers various Franklinite products, allowing mineral enthusiasts to bring a piece of Franklinite into their lives.

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Franklinite is a captivating mineral with its fascinating composition, distinctive characteristics, and rich history.

Whether appreciated for its industrial applications or admired for its beauty in collector specimens, Franklinite intrigues scientists and mineral enthusiasts alike. Through Keycap Quarry, one can explore and acquire Franklinite products, including the exquisite Franklinite keycaps, which provide a unique and tangible connection to this remarkable mineral.

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