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Golden Selenite

Golden Selenite

Golden selenite is a beautiful variety of crystalline gypsum, prized for its warm honey-yellow to amber coloration, translucent appearance, and distinctive crystal structure.

While pure selenite is typically colorless or transparent, natural impurities and mineral inclusions can produce shades of gold, yellow, orange, and brown. Iron-bearing materials are often responsible for these warm colors. Unlike quartz, which is relatively hard and durable, selenite is remarkably soft and delicate. Its crystals can develop broad, flat faces that reflect light with a glassy or pearly luster.

Golden selenite from Utah's desert landscapes is a striking example of how ordinary mineral ingredients can produce extraordinary natural formations.

Approximately 165 million years ago, during the Middle Jurassic Period, much of what is now southern and central Utah was influenced by shallow seas, coastal lagoons, tidal flats, and arid environments. As mineral-rich water evaporated, dissolved calcium sulfate became concentrated enough to precipitate as gypsum.

The Carmel Formation, prominently exposed in Utah's San Rafael Swell and surrounding regions, preserves evidence of these ancient environments. Its sedimentary layers include gypsum, sandstone, limestone, mudstone, and siltstone.

The golden selenite found in this region represents part of that remarkable geological history — a mineral record of waters that vanished long before the modern Utah desert existed.

Chemically, golden selenite is the same mineral as clear selenite: hydrated calcium sulfate. Its golden appearance is not caused by gold. Instead, coloration generally results from trace impurities, mineral inclusions, or staining acquired during formation or subsequent geological processes. Iron oxides and other iron-bearing compounds can produce attractive honey, amber, yellow, and rusty-orange tones. Depending on crystal clarity and the distribution of these impurities, light passing through the mineral may create a luminous, almost glowing appearance.

Gypsum minerals have been used by civilizations for thousands of years.

Historically, varieties of gypsum were employed in sculpture, ornamental carvings, plaster, and decorative architecture. Some large, transparent gypsum crystals were even split into thin sheets and used as window material.

Today, gypsum remains an important industrial mineral used in drywall, plaster, cement, and agricultural applications, however, attractive golden selenite crystals are most commonly appreciated as natural mineral specimens, educational displays, and decorative collectibles.

Golden selenite is best displayed indoors, away from excessive moisture and frequent handling. Because it is softer than most common minerals, its surfaces can scratch easily. Avoid cleaning it with water, chemical cleaners, or abrasive materials, a soft, dry brush is generally the safest way to remove loose dust.

Careful handling will help preserve its natural crystal faces, golden coloration, and distinctive luster for years to come.

Locality

San Rafael Swell region, Utah

Golden Selenite

Streak

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Hardness

Formula

2

CaSO₄·2H₂O

Habit

Monoclinic

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