Please note: both metallic & pearl epoxy pigments pastes can solidify due to being highly pigmented, you can return them to a smooth consistency by warming them up.
Placing them in a hot bath (keeping lid area above water level so no water can seep in), will liquify the entire jar within 10mins (depending on the temperature of your hot water from the tap), this will bring the pigment back to a smoother consistency. 
You can also set the jar on a hot water bottle (recommend a wax or parchment paper between jar & bottle). 

Always open jars carefully as pressure can build during shipping. Always stir pastes prior to use.