Menilite

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.

References

Miscellaneous

Notable varieties

Chalcedony	Agate Carnelian Chrysoprase Heliotrope Onyx

Opal	Fiorite Geyserite

Quartz	Amethyst Ametrine Smoky quartz Shocked quartz Vermarine

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