How do I identify Orpiment?

Orpiment can be identified by its hardness of 1.5 - 2 on the Mohs scale, Orange-yellow to lemon-yellow color, Pearly luster, Monoclinic crystal system. Look for these key characteristics when examining specimens.

What color is Orpiment?

Orpiment typically appears in Orange-yellow to lemon-yellow. Color can vary depending on impurities and formation conditions.

How hard is Orpiment?

Orpiment has a hardness of 1.5 - 2 on the Mohs scale. This makes it a soft mineral that can be scratched easily.

Orpiment

A variety of Minerals

Uncommon

What is Orpiment?

Orpiment is a fairly rare mineral that usually bears a striking golden or yellow-orange hue. Historically, this arsenic-containing mineral was used until the 19th century when it was replaced by less-toxic options. Specimens of orpiment with large, striking crystals may be sought out by collectors. The mineral is also used today in the production of semiconductors and photoconductors.

Etymology & Origins

Orpiment takes its name from the Latin auripigmentum (aurum, "gold" + pigmentum, "pigment") because of its deep-yellow color.

Uses & Applications

Orpiment has a myriad of historical uses, ranging from poison to pigment. Today it is still a major source of arsenic, and it is also used to manufacture oil cloth. Orpiment is also commonly used to create semiconductors and photoconductors.

Healing Properties

Orpiment is believed to stimulate the mind and allow one to become more attuned to their own personal desires. When used on the solar plexus chakra, it is said to increase people's energy levels, allowing them to focus on the things most important to them while promoting a clearer perception of the people and circumstances in their daily life. Because of possible toxins associated with this stone, handwashing is recommended after handling.

Orpiment Market Value Calculator

Estimate the market value of Orpiment using size, quality, and finish. This preview calculator is for quick context and is not a formal appraisal.

Orpiment Localities Map

See where Orpiment is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.

Map preview

North ZoneCentral RidgeSouth Basin

Associated Chakras

Solar Plexus

Key Characteristics

Characteristics of Orpiment

Orpiment is a common monoclinic arsenic sulfide mineral. It has a Mohs hardness of 1.5 to 2 and a specific gravity of 3.49. It melts at 300 °C (570 °F) to 325 °C (620 °F). Optically, it is biaxial (−) with refractive indices of a = 2.4, b = 2.81, g = 3.02.