Eztlite
Chemical formula: Pb<sup>2+</sup><sub>2</sub>Fe<sup>3+</sup><sub>3</sub>(Te<sup>4+</sup>O<sub>3</sub>)<sub>3</sub>(S<sup>6+</sup>O<sub>4</sub>)O<sub>2</sub>Cl
Eztlite is a very rare lead iron tellurite and sulfate, forming microscopic, platy crystals of an intense red color.
Properties
- Mohs hardness
- 2
- Luster
- Vitreous to Sub-Adamantine
- Streak
- Red
- Density
- 6.65
- Cleavage
- Perfect on {0001}
- Fracture
- Uneven
- Transparency
- Translucent to Opaque
- Crystal system
- Trigonal
Diagnostic features
## Identification Identification of eztlite is based on its unique features: intense red color, characteristic form of thin, platy crystals forming rosetted aggregates, and co-occurrence with other rare tellurites. Due to its microscopic size, final confirmation requires advanced analytical methods such as Raman spectroscopy or chemical analysis (EDS). ## Distinguishing from Similar Minerals Eztlite can be confused with other red secondary minerals found in oxidation zones, such as realgar, cinnabar, or some chromates (e.g., crocoite). However, it is distinguished by its crystal habit (thin plates in rosettes), much smaller size, and specific tellurium-rich geochemical environment. Unlike crocoite, it does not form prismatic crystals. ## Crystal Forms Eztlite crystallizes as very thin, hexagonal or pseudohexagonal plates. These crystals almost always occur as small, rosetted or radial aggregates, as well as thin coatings on the rock surface.
Geological environment
## Genesis Eztlite is a secondary mineral, formed in the oxidation zones of hydrothermal deposits rich in tellurium. It forms under low-temperature conditions as a result of the weathering of primary tellurides and sulfides in the presence of chlorine-bearing solutions. ## Mineral Associations This mineral co-occurs with other rare tellurites and tellurates, such as emmonsite, mcalpineite, schieffelinite, quetzalcoatlite, as well as with cerussite, native gold, pyrite, and quartz. ## Localities The most important and type locality for eztlite is the Bambollita (La Oriental) mine in Moctezuma, Sonora, Mexico. This is the primary location from which the best-formed specimens originate. The mineral has also been identified in several other places worldwide, including the Grand Central mine in Tombstone, Arizona (USA), and the Kawazu mine in Shizuoka Prefecture, Japan.
Rarity
Very rare
For collectors
## Quality Criteria The collector appeal of eztlite primarily depends on the richness and aesthetics of the crystal aggregates. Most valued are specimens showing numerous, well-formed, intensely red rosettes of crystals, clearly contrasting with the host rock. The size of individual crystals, although always microscopic, is also important – larger plates are more desirable. Contrast with associated minerals, such as white quartz or cerussite, enhances the visual value of the specimen. ## Popular Localities By far the most valued and sought-after specimens by collectors come from the type locality – the Bambollita mine in Mexico. Specimens from Tombstone, Arizona, are also known, but are usually less spectacular.
Care and storage
## Cleaning Eztlite specimens are extremely delicate and susceptible to mechanical damage. Cleaning is not recommended. Any attempts to remove dust should be carried out with the utmost caution, preferably using a soft brush or a gentle stream of compressed air from a distance. ## What to Avoid Avoid contact with water, chemicals, ultrasound, and any vibrations or impacts. The crystals are microscopic and very brittle, so any careless handling can lead to their irreversible destruction. ## Storage Specimens should be stored exclusively in stable, sealed "micromount" containers that protect against dust, moisture, and mechanical damage. Store in a dry place, away from sources of vibration.