Overview

Augelite is a rare aluminum phosphate hydroxide, prized by collectors for its sharp wedge-shaped crystals, bright vitreous luster, and associations with classic pegmatite and hydrothermal vein localities. Colors range from colorless and milky white to soft greens and honey tones; the finest pieces can be surprisingly transparent and glassy. Individual crystals are typically small—often a few millimeters to 2–3 cm at best—but they can form elegant clusters on contrasting matrix such as quartz, arsenopyrite, siderite, or schist. A perfect cleavage and relatively modest hardness make pristine, undamaged crystals desirable and sometimes hard to find. Aesthetic, translucent to transparent groups from Portugal and Peru are the current standard-bearers, while classic European occurrences and phosphate-rich metamorphic deposits in Canada supply excellent reference specimens and fine micromounts.

Popularity

Augelite occupies a sweet spot for collectors who appreciate rarities with strong crystal form but without the price volatility of the mainstream “big three.” It is not abundant, and most pockets produce small runs; yet enough material has reached the market—from historical European mines to modern finds in Portugal, Peru, and Canada—that collectors can assemble good representations without chasing unicorns. The species draws attention for:

• Distinctive wedge/“cleaved” look and high luster that reads well even in small sizes.
• Attractive pairings with quartz and sulfides in Panasqueira, and with quartz and arsenopyrite from Peru.
• Classic micro-assemblages with lazulite and siderite from the Yukon phosphate localities.

The finest matrix pieces are scarce and often snapped up quickly, while sharp, damage-free thumbnails and micromounts remain accessible and are perennial favorites in competition cases.

Top Collecting Localities

While augelite is scattered worldwide, a handful of districts are especially known for collectible crystals with strong form, luster, and good associations.

Collector’s Guide

Evaluating Specimen Quality

• Color and Transparency: The most desirable augelite shows bright, water-clear to translucent crystals with a subtle tint (colorless to pale green or honey). Deeply colored pieces are uncommon; value comes more from clarity and luster than strong saturation.
• Luster: Fresh, glassy faces that reflect light cleanly are a hallmark of top augelite. A silky or matte surface usually indicates etching or micro-pitting and is less desirable unless the composition is exceptional.