black lead

Blacklead may refer to:

• Graphite, also known as "black lead"
• Blacklead, another name for the Plumbago drawing style and medium
• Blacklead Island, Nunavut, Canada

Graphite , archaically referred to as Plumbago, is a crystalline form of carbon, a semimetal, a native element mineral, and one of the allotropes of carbon. Graphite is the most stable form of carbon under standard conditions. Therefore, it is used in thermochemistry as the standard state for defining the heat of formation of carbon compounds. Graphite may be considered the highest grade of coal, just above anthracite and alternatively called meta-anthracite, although it is not normally used as fuel because it is difficult to ignite.