Blue Lake Crater's major rock composition components are basalt and picrite basalt (picrobasalt). Analysis of components from Blue Lake Crater eruptive deposits for calc-alkaline melt inclusion showed compositional similarities with the Yapoah and Collier cones, indicating that Blue Lake Crater is also made up of basaltic andesite.
The main rock constituents of Blue Lake Crater are basalt and picrobasalt. Studies of the crater's eruptive deposits showed comparable compositions to those of the Yapoah and Collier cones, implying a similar composition of basaltic andesite for Blue Lake Crater.