💎 Zeolites

🔬 Optical and Microscopic Properties:

🔹 They are colorless in thin sections under natural light.
🔹 Their relief is weak to moderate and negative.
🔹 Their birefringence is very weak to weak (ranging from 0 to 0.015).
🔹 The interference color is white, gray to pale yellow, grade 1.
🔹 They often exhibit complete cleavage parallel to the {110} or {010} planes.
🔹 Extinction in most of them is direct. In their cross sections, symmetrical extinction is often observed.
🔹 The elongation sign is positive in some and negative in others.
🔹 Identification of their types is usually done using X-rays.

@petrography_ts

Tourmaline and Albite🤩

Opal 🤩

Quartz & Fluorite 🔥

Garnet crystals 🤩

Phorohyroblast , Garnet

Garnet in mica schist 🤩

Glaucophane, Epidote and Garnet 🤩

Grossular crystals 🤩

forsterite in thin section( PPL)

@petrography_ts

XPL

Pyroxene

🔬tephroite in thin section FKM-43 XP

tephroite (1.47 Mn2+ apfu) olivine in high grade calcareous Mn metasomatite, with calcite
@petrography_ts

Crystals world ✨

Kyanite 🔮

🔬kyanite in thin section

kyanite in amphibolite facies meta-ferrolite, with quartz, Co-bearing staurolite and magnetite.