Christmas Geologist Gift Baseball T-Shirts

Makes a great birthday or christmas gift for any geologist, geology lover, rock lover, geode hunter, geology teacher, geology graduate, geology student, professor and rock mineral collectors. Funny geology saying.

Pompeii 79 A.D. Spoiler alert - it's hot.

Makes a great birthday or christmas gift for any geologist, geology lover, rock lover, geode hunter, geology teacher, geology graduate, geology student, professor and rock mineral collectors. Funny geology saying.

Cummingtonite (/ˈkʌmɪŋtənaɪt/ KUM-ing-tə-nyte) is a metamorphic amphibole with the chemical composition (Mg,Fe2+) 2(Mg,Fe2+)5Si8O22(OH)2, magnesium iron silicate hydroxide. Monoclinic cummingtonite is compositionally similar and polymorphic with orthorhombic anthophyllite, which is a much more common form of magnesium-rich amphibole, the latter being metastable. Cummingtonite shares few compositional similarities with alkali amphiboles such as arfvedsonite, glaucophane-riebeckite. There is little solubility between these minerals due to different crystal habit and inability of substitution between alkali elements and ferro-magnesian elements within the amphibole structure.

Of quartz I love geology

Geology rocks