CaCO₃

#GUR2UVJYL

#JLUGR02

#C8VVJ2QUG

#P2PC9YCY

#PQ90Q9LCV

#9VV29J8GG

#8QGUQ809

#8YP2902U

#9RRRC8QG

#9CVUUP28

#200GVGQYGQ

#UJCUVC00V

#2RYRU09GY

#8L82Q0U8

#P0U89JJ

#UC88YRL09

#G9YL2GUP

#QGJYL0CQU

#LUVUJRU9P

#UQ020PG

#UVQRL2UV0

#20YC0J0LVQ

#JYGP9GYY8

#8YVG8ULL

#YUL0LG2VL

#9R9Y88QR

#QRC8V9JRQ

#UQ82Y2JRJ

#JRPJGLLR2

#V8GYUJUUU

#PJC8QV8PY

#V8V9JG288

#PYGYLJJG

#20QJLJYQLJ

#9V8C0RV8Y

#8QV88JU0

#V0P2U2GJ0

#CCCRV8RVR

#2092CYJJC

#20PGLQLJJ2

#V2222PC0L

#20RC8299U2

#VQQ8UCLVU

#2R2L0YP2

#20YQLVVQ8L

#8R9J9YRL

#CQL9YJUVC

#82R222L9

#QYRCGLV

#20QQPQ08QP