Sharp Dioptase Crystals on Contrasting Matrix – 43mm

Description

This 43mm specimen is a true “textbook” collector’s piece. It features isolated, well-defined crystals rather than a crowded crust, allowing the individual crystal geometry to be the star of the show.

Sharp Dioptase Crystals on Contrasting Matrix – 43mm

Locality: Republic of the Congo (DRC)

Dimensions: 43 mm x 24 mm

Visual Characteristics

This specimen is aesthetically balanced, showcasing several large, individual rhombohedral crystals perched elegantly on a light-colored, slightly pinkish-tan matrix.

• Crystal habit: The crystals are exceptionally sharp and blocky. Because they are not crowded, you can clearly see the perfect trigonal terminations and smooth, glassy faces that define the species.

• Color: The crystals possess a deep, “forest-emerald” saturation. When light hits the edges, you see the characteristic neon-teal glow that makes Congolese dioptase so famous.

• Luster: Intense vitreous luster. The large, flat planes of the crystals act as natural mirrors, reflecting sharp, bright flashes.

• Contrast: The stark difference between the dark, jewel-toned green crystals and the pale, earthy matrix provides a sophisticated look that is highly desirable for display.

Technical Summary

• Mineral: Dioptase ($CuSiO_{2}(OH)_{2}$)

• Hardness: 5 on the Mohs scale.

• Form: Isolated crystals on a silicified matrix.

• Condition: Excellent; the crystal terminations are remarkably intact and crisp.

Collector’s Appeal

This piece is perfect for the collector who prefers clarity and crystal definition over a solid green mass. The “island” style growth (isolated crystals on matrix) is often preferred for high-end photography and cataloging because it showcases the mineral’s natural habit so clearly.

Display Suggestion

Since the crystals are positioned on one primary face, this 43mm specimen looks best when displayed vertically on an acrylic wedge. Under a warm-white LED, the matrix will take on a soft glow, while a focused cool-white spotlight will make the emerald-green crystals “ignite” with color.