SCHORLOMITE

    Class : Silicates
    Subclass : Nesosilicates
    Crystal system : Cubic
    Chemistry : Ca3Ti2(Fe2Si)O12
    Rarity : Rare


Schorlomite is a titaniferous variety of andratite, containing more than 15% TiO2. Andratite is the ferrous term of the group of calcium garnets also called ougrandite. Andratite forms two series with grossular on the one hand and with ouvarovite on the other. Like melanite (the other titaniferous variety of andratite), it is mainly a mineral of alkaline rock complexes, particularly carbonatites, although it can also be found in some skarns. Its name comes from schorl and the Greek homos (similar), because it resembles the black variety of tourmaline. Indeed, its high titanium content gives it a black or very dark color. Its crystals are most often dodecahedral.

Main photo : Schorl from Erongo Mountains, Usakos, Namibia

Schorlomite in the World

Schorlomite is a rare variety, the most beautiful crystals of which exceed 8 cm and come from the alkaline complex of Ice River (British Columbia, Canada). The carbonatite of Polino (Italy) is characterized by zirconium-rich schorlomites. It is also present in the skarn of Magnet Cove (Akansas). Good crystals are also known from Jebel Bou-Agrao (Morocco) associated with nepheline.

Right photo : Schorlomite and nepheline from Jebel Bou-Agrao, Morocco © Rui Nunes


Schorlomite in France

Schorlomite is not present in the French underground.

Twinning

No twinning known for this mineral species.

Fakes and treatments

No fakes listed for this mineral species.



Hardness : 7 to 7.5
Density : 3.86
Fracture : Conchoidal
Streak : Black to orange-red


TP : Translucent to opaque
RI : 1.940 to 1.980
Birefringence : 0
Optical character : None
Pleochroism : None
Fluorescence : None


Solubility : Hydrofluoric acid

Magnetism : NoneRadioactivity : None

ReCaptcha

This service is used to secure web forms of our website and required if you want to contact us. By accepting it you agree to Google's privacy policy: https://policies.google.com/privacy

Google Analytics

Google Analytics is a service used on our website that tracks, reports traffic and measures how users interact with our website content in order for us to improve it and provide better services.

Facebook

Our website allows you to like or share its content on Facebook social network. By activating and using it you agree to Facebook's privacy policy: https://www.facebook.com/policy/cookies/

YouTube

Integrated videos provided by YouTube are used on our website. By accepting to watch them you agree to Google's privacy policy: https://policies.google.com/privacy

Twitter

Integrated tweets and share services of Twitter are used on our website. By accepting and using these you agree to Twitter's privacy policy: https://help.twitter.com/en/rules-and-policies/twitter-cookies

PInterest

Our website allows you to share its content on PInterest social network. By activating and using it you agree to PInterest's privacy policy: https://policy.pinterest.com/en/privacy-policy/