Maruyamaite, K(MgAl 2 )(Al 5 Mg)Si 6 O 18 (BO 3 ) 3 (OH) 3 O, a potassium-dominant tourmaline from the ultrahigh-pressure Kokchetav massif, northern Kazakhstan: Description and crystal structure Available to Purchase

Pieczkaite, ideally Mn 5 (PO 4 ) 3 Cl, a new apatite-supergroup mineral from Cross Lake, Manitoba, Canada: Description and crystal structure Available to Purchase

Eckermannite revised: The new holotype from the Jade Mine Tract, Myanmar—crystal structure, mineral data, and hints on the reasons for the rarity of eckermannite Available to Purchase

Agakhanovite-(Y), ideally (YCa)□ 2 KBe 3 Si 12 O 30 , a new milarite-group mineral from the Heftetjern pegmatite, Tørdal, Southern Norway: Description and crystal structure Available to Purchase

Carlfrancisite: Mn 3 2+ (Mn 2+ ,Mg,Fe 3+ ,Al) 42 (As 3+ O 3 ) 2 (As 5+ O 4 ) 4 [(Si,As 5+ )O 4 ] 6 [(As 5+ ,Si)O 4 ] 2 (OH) 42 , a new arseno-silicate mineral from the Kombat mine, Otavi Valley, Namibia Available to Purchase

Alpha-decay damage in titanite Available to Purchase