Roméite is a series comprising
All the minerals are oxides, roméite group, pyrochlore supergroup
Specific gravity (calculated): 6.732 (oxyplumboroméite) 5.113 (fluorcalcioroméite)
Hardness: 5 (oxyplumboroméite) 5½ (fluorcalcioroméite)
Streak: Brownish yellow
Colour: Yellow to brownish yellow (oxyplumboroméite), yellow to orange (fluorcalcioroméite)
Common impurities: Ca,Fe3+,Mn,Na
Roméite is a secondary mineral in some manganese-bearing
hydrothermal mineral deposits which commonly have undergone metamorphism
(Webmin, HOM, Dana).
Tripuí, Ouro Preto district, Ouro Preto, Minas Gerais, Brazil is the type locality for hydroxylcalcioroméite.
At St. Marcel, Italy, roméite is associated with epidote and manganese oxides (HOM).
At its type locality, the Starlera Mine, Starlera Valley, Ferrera Valley, Hinterrhein Valley, Grisons, Switzerland, fluorcalcioroméite is associated with braunite, calcite, hematite, quartz and wallkilldellite (Mindat).
At its type locality, the Harstigen Mine, Pajsberg, Persberg ore district, Filipstad, Värmland County, Sweden, oxyplumboroméite is found in fissure fillings in tephroite skarn, associated with tephroite, leucophoenicite and calcite (Mindat).
At Franklin, New Jersey, USA, roméite is associated with yeatmanite, sarkinite, willemite, diopside and andradite (HOM).
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