How do I identify Monazite-(ce)?

Monazite-(ce) can be identified by its hardness of 5 - 5.5 on the Mohs scale, Commonly reddish brown to brown; shades of green to brown color. Look for these key characteristics when examining specimens.

What color is Monazite-(ce)?

Monazite-(ce) typically appears in Commonly reddish brown to brown; shades of green to brown, yellow brown, rarely nearly white; yellow, colourless in transmitted light.. Color can vary depending on impurities and formation conditions.

How hard is Monazite-(ce)?

Monazite-(ce) has a hardness of 5 - 5.5 on the Mohs scale. This gives it moderate hardness.

How to Identify Monazite-(ce) | Properties, Meaning & Uses

What is Monazite-(ce)?

Monazite-(Ce) is the most common representative of the monazite group. It is the cerium-dominant analogue of monazite-(La), monazite-(Nd), and monazite-(Sm). It is also the phosphorus analogue of gasparite-(Ce). The group contains simple rare earth phosphate minerals with the general formula of ATO4, where A = Ce, La, Nd, or Sm (or, rarely, Bi), and B = P or, rarely, As. The A site may also bear Ca and Th.

Monazite-(ce) Market Value Calculator

Estimate the market value of Monazite-(ce) using size, quality, and finish. This preview calculator is for quick context and is not a formal appraisal.

Monazite-(ce) Localities Map

See where Monazite-(ce) is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.

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North ZoneCentral RidgeSouth Basin

Quick Facts

Physical Properties

Color: Commonly reddish brown to brown; shades of green to brown, yellow brown, rarely nearly white; yellow, colourless in transmitted light.
Hardness (Mohs): 5 - 5.5
Density: 5.26 g/cm³
Streak: White, faintly coloured.

Chemical Properties

Chemical Formula: Ce(PO4) Always contains major to minor amounts of other REE (Nd, La, Sm, ...) replacing Ce. Also often contains trace amounts of U and Th (coupled with Ca).
Elements: Ce, O, P