In the monoclinic system, the crystal is described by vectors of unequal length. They form a rectangular prism with a parallelogram as its base. Hence two pairs of vectors are perpendicular, while the third pair makes an angle other than 90°.

"A" Crystals

"B" Crystals

"C" Crystals

 

 

"D" Crystals

"E" Crystals

"F" Crystals

"G" Crystals

 

 

"H" Crystals

"I" Crystals

"J" Crystals

"K" Crystals

Howlite
Hessonite

"L" Crystals

"M" Crystals

"N" Crystals

"O" Crystals

"P" Crystals

"Q" Crystals

"R" Crystals

"S" Crystals

"T" Crystals

"U" Crystals

"V" Crystals

"W" Crystals

"X" Crystals

"Y" Crystals

"Z" Crystals