Helenite | Gemopedia

Also known as Mount St. Helens stone, helenite is a man-made stone that originates from the ashes of the Washington State Mount St. Helens eruption in 1980. While the volcanic ash was being removed, it was discovered that it contained glass particles that turned a beautiful green color when heated. This glass is commonly made and fashioned into jewels that may be green, red or blue.
Alternate
Names
Mount St. Helens Obsidian, Emerald Obsidianite(TM) And Ruby Obsidianite(TM)
Colors
Green, Red, Blue

Helenite Classification

Common Name

Helenite

Species

NA

Variety

Colors

Green, Red, Blue

Alternate Names

Mount St. Helens Obsidian, Emerald Obsidianite(TM) And Ruby Obsidianite(TM)

Gemstone Groups

Key Separations

Comments

First created after the Mount St. Helens explosion when recovery workers heated volcanic ash with acetylene torches.

Helenite Optical Properties

Transparency

Transparent - Translucent

Refractive Index

1.49
Tolerance:(+0.020/-0.010)

Birefringence

Optic Character

NA

Optic Sign

NA

Polariscope Reaction

Singly Refractive (SR) With ADR

Fluorescence

SWUV:
LWUV:

CCF Reaction

Pleochroism

None

Dispersion

Comments

Helenite Chemistry & Crystallography

Chemical Name

silica

Chemical Formula

Synthesis

Crystal System

NA

Classification

Nature

Synthetic

Crystallinity

Amorphous

Comments

Helenite Characteristic Physical Properties

Hardness

5-5.5

Streak

Specific Gravity

2.32-2.4 Typical:2.36

Toughness

Varies

Inclusions

Helenite might have air bubbles.

Luster

Vitreous

Stability

Fracture

Conchoidal

Cleavage

None

Comments

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