Monazite-(la)
Monazite-(La)
A variety of Minerals
What is Monazite-(la)?
Monazite-(La) is a relatively rare representative of the monazite group, with lanthanum being the dominant rare earth element in its structure. As such, it is the lanthanum analogue of monazite-(Ce), monazite-(Nd), and monazite-(Sm). It is also the phosphorus analogue of gasparite-(La). 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.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Monazite-(la) before comparing listings or appraisals.
Size & Weight
Larger, intact specimens usually command higher prices.
Rarity & Demand
Scarce material or popular varieties sell at a premium.
Condition & Finish
Chips, repairs, and heavy wear lower value; clean prep helps.
Treatment & Provenance
Untreated specimens with documented locality are prized.
Monazite-(la) Localities Map
See where Monazite-(la) is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Hardness (Mohs)
- 5 - 5.5
- Density
- 5.13 g/cm³
Chemical Properties
- Chemical Formula
- La(PO4)
- Elements
- La, O, P
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Monazite-(la) FAQs
How do I identify Monazite-(la)?
Monazite-(la) can be identified by its hardness of 5 - 5.5 on the Mohs scale. Look for these key characteristics when examining specimens.
How hard is Monazite-(la)?
Monazite-(la) has a hardness of 5 - 5.5 on the Mohs scale. This gives it moderate hardness.
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