Beryllusstones
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Al-Fayyumi (d1368 CE): Al-Misbah al-Munir fi Gharib al-Sharḥ al-Kabir. He was an Egyptian lexicographer who served as a mosque imam in Syria. Al-Fayyumi’s Miṣbaḥ goes beyond being only a technical dictionary due to its wide scope, making it a general dictionary of the Arabic language with a focus on explaining technical words used in the science of fiqh (Islamic jurisprudence). He writes some general things on East Africa.
Taken from: http://islamport.com/d/3/lqh/1/58/533.html
P59
Beryllus (1); a well-known kind of stone, the best of which is brought from the islands of the Zinj.
P117
Abyssinia
A race of Sudan; it is the name of them and this is short as (Habish) and this name is including Fatima bint Abi Habish (2), and the Abyssinia language is called Habashi.
P251
The giraffe
It is said that he was named with the name of “the group” because its form is a composition of a group of animals and (giraffe) this means group with the opening letter of the Zai.
P255
Znj: A group of Sudanese living below the equator and further south of them there are no more buildings some said that their country extends from Morocco to near Abyssinia and some parts of their country touch on Egypt. Al Zinj such as: Rom and Romy, the Zai letter …..
(1) Beryllus: Pure beryl is colorless. Well-known varieties of beryl include emerald and aquamarine.
(2) Fatima bint Abi Habish: known for the questions see asked the Prophet about menstrual bleeding.