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REALGAR (AURIPIGMENT) with RATHITE (LENGENBACH)

REALGAR (AURIPIGMENT) with RATHITE (LENGENBACH)

$299.00 AUD
$299.00 AUD
SALE ! TOO LATE, SOLD
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A very rare and older specimen from the Lengenbach Quarry.

Realgar, also referred to as arsenic blende, ruby sulfur, or ruby of arsenic, is a mineral composed of arsenic sulfide with the chemical formula α-As4S4. This soft and sectile mineral typically forms in monoclinic crystals or appears in granular, compact, or powdery forms, often found alongside the related mineral orpiment (As2S3). Characterized by its orange-red hue, realgar melts at 320 °C and burns with a bluish flame, emitting arsenic and sulfur fumes. It has a Mohs hardness ranging from 1.5 to 2 and a specific gravity of 3.5, with an orange streak. Realgar is trimorphous, existing in forms such as pararealgar and bonazziite.

TOXIC, DO NOT EXPOSE TO LIGHT (DESINTEGRATES)

RATHITE  (a complex silver sulfide)

Ag2Pb12-xTlx/2As18+x/2S40
May contain minor Sb substituting for As.
Substitution 2Pb <-> Tl + As. Topa & Kolitsch (2018) revised the general formula to AgxTlyPb16-2(x+y)As16+x+y-zSbzS40 (with 1.6 < x < 2, 0 < y < 3, 0 < z < 3.5).

Specimen details

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Where known, the origin of the specimen is mentioned. The number at the end, is the specimen number in our collection. Colours may vary, due to photography.

Care

It's important to know that many minerals can be effectively cleaned with water. However, before using any cleaning methods, such as dissolvers or ultrasound, please take the time to research online. Improper use of these techniques could potentially harm your specimen.

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