Menilite

Menilite is a greyish-brown form of the mineraloid opal.^[1] It is also known as liver opal or leberopal (German), due to its color. It is called menilite because it was first described from Ménilmontant (Paris), France,^[1] where it occurs as concretions within bituminous Early Oligocene Menilite Shales.

See also

• Geyserite
• Hyalite

References

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Silica minerals

Crystalline

• Coesite
• Cristobalite
• Keatite
• Moganite
• Quartz
• Seifertite
• Stishovite
• Tridymite

Cryptocrystalline

• Chalcedony
• Chert
• Flint
• Jasper

Amorphous

• Fulgurite
• Lechatelierite
• Opal

Miscellaneous

• Tiger's eye
• Aqeeq

Notable varieties

Chalcedony	Agate Carnelian Chrome chalcedony Chrysoprase Heliotrope Moss agate Onyx
Opal	Fiorite Geyserite
Quartz	Amethyst Ametrine Herkimer diamond Smoky quartz Shocked quartz Prasiolite
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