Rasendracudamani 14.116

14.116

{kālaloha, kāntaloha:: high quality of bhasman}
kālalohena kāntena bhasmaitatparikalpayet /
anyalohakṛtaṃ bhasma naitādṛśaguṇātmakam //

[High quality of ash of kālaloha and kāntaloha:]
One should prepare this ash with kālaloha or with kāntaloha;
ash made from other iron does not possess such qualities.