| Mineral: | Tiptopite: K2(Na,Ca)2Li3Be6(PO4)6(OH)2·(H2O)
Englishite: K3Na2Ca10Al15(PO4)21(OH)7·26(H2O)
Montgomeryite: Ca4MgAl4(PO4)6(OH)4·12(H2O)
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| Comments: | Red montgomeryite lath-like crystals to 1mm in 2mm rosettes associated with clear, acicular sprays of tiptopite to 0.75mm and white cottonball-like crystals of englishite to 0.2mm. |
| Location: | Tip Top mine, Custer Co., South Dakota, USA. |
| Scale: | Picture size 5 mm. |
| Copyright: | © Tom Loomis / Dakota Matrix |
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