Tags » Mineralogy

Chimneys and smoke at the bottom of the sea: signs of a fire below!

One of the most spectacular features of geology (at least to me) are black smokers. They consist of hollow conduits where hot, nearly boiling fluids exit the oceanic crust. 755 more words


New Apophyllite and Quartz Specimens

Formed from mineral-rich hot fluids in igneous rocks, beautiful apophyllite is a popular mineral to collect because of its multiple colors, large crystals, abundance and relative low cost- it’s often the young collector’s step up from quartz. 153 more words

The Crystal Society; An introduction

Many strange stories can be heard on university benches during coffee breaks. During my undergraduate studies, a friend used to make fun by saying: “Minerals are devious and have their own secret organization that will rule the world one day”. 948 more words


Salty Flows on Mars!

Post contributed by Lujendra Ojha, Georgia Institute of Technology.

Recurring slope lineae (RSL) are dark, narrow features forming on present-day Mars that have been suggested to be a result of transient flowing water. 660 more words


Collecting minerals around the world

At some time, I suppose we have all collected rocks or minerals when we were travelling to new places, mostly as mementos, but nothing quite beats the buzz of collecting specific minerals from classic locations with like-minded colleagues. 1,732 more words


A Field Guide to Topaz and Associated Minerals of the Thomas Range, Utah (Topaz Mountain), Volume 1: by John Holfert et alia: A Short Review

Topaz is one of those beautiful minerals which, at its best, is water clear and appears in many different colours, including a pale blue, a delicate yellow and a watery light brown vaguely reminiscent of a nice dry sherry. 759 more words

Book Reviews

Zagoran Energy

Boro Ivic waited watchfully for the vacuum-ship from Pozhega planet to dock at the giant station. He was the one and the only welcome for the off-world foreign geological expert hired to come to Zagora and help that backward society solve its crippling fuel and power problems. 2,734 more words