Discover new knowledge and insights with IDNLearn.com's extensive Q&A platform. Get the information you need quickly and accurately with our reliable and thorough Q&A platform.
Answer:
The Speaker's Mother has passed away.
Granite is usually found underground and when corpses begin to decay, they soon become one with the ground. they become "the granite of the granite hill." Also, The term "Had", implies past tense meaning she has it no more in life, but still has it in death. "The courage my mother HAD went with her, and is with her still."