Vivianite

Vivianite from Romania, particularly the Roșia Poieni Mine in Alba County, is known for high-quality vivianite crystals. These crystals are often blue-green, translucent, and have a distinctive prismatic or blade-like shape.
Elaboration:
Geographic Location:
The Roșia Poieni Mine in Romania is a significant source of vivianite, known for the quality of its crystals.
Crystal Characteristics:
Vivianite crystals from Romania are typically described as blue-green, translucent, and exhibiting a prismatic or blade-like shape.
Mineral Properties:
Vivianite is a hydrous iron phosphate mineral. It’s often sought after for its deep teal color and translucence.
Formations:
The highest quality vivianite crystals are typically found within hydrothermal veins.
Size and Appearance:
Vivianite crystals from Romania can be relatively large, with specimens reaching 2 cm in length.
Similarities to Kryptonite:
The deep blue to greenish-blue hues and unique crystal formations of vivianite can resemble the popular depiction of kryptonite, according to FossilEra.com

Vivianite specimen.