Beautiful shard of Scolecite I have, it looks like ice crystals ❄️ While it looks very similar, it’s not the same as mesolite or natrolite, but all 3 are types of zeolites
沸石 (Zeolite Group) Probably Phillipsite, Chabazite, Cowlesite, Natrolite, Scolecite etc. on Basalt from Penghu. 臺灣澎湖縣 Penghu Islands, Penghu County, Taiwan.