Variscite

Variscite is a hydrated aluminum phosphate mineral. It is a softer mineral whose best specimens are often made into jewelry. It's most commonly known in green but also comes in  bluish green, colorless to white, pale shades of brown or yellow, rare red.

Although variscite is more rare than turquoise and often contains webbing like turquoise it sells for less as it is less well known. 

Variscite forms when phosphorous rich water passes through aluminum rich environment and creates nodules and fills veins.