This joaquinite sample is a silicate which contains barium and titanium but it has the additional distinction of containing the element cerium. Its composition is NaBa₂FeTi₂Ce₂(SiO₃)₈O₂(OH)H₂O . The sample size is about 6x3.5 cm and it is from San Benito County, California. All these samples are on display at the Smithsonian Museum of Natural History.

Neptunite is is a silicate which contains titanium and manganese but it has the additional distinction of containing the element lithium. Its composition is KNa₂Li(Fe,Mg,Mn)₂Ti₂Si₈O₂₄. It is from San Benito County, California. The single crystal sample at left is about 6x4 cm overall and the sample below is about 13x16 cm.