has objects made from this been found in the african continent?
Yes, the large portrait heads such as the Bronze Head from Ife of "heavily leaded zinc-brass".
Brass
 Though normally described as "bronzes", the Benin Bronzes, now mostly in the British Museum and other Western collections, and the large portrait heads such as the Bronze Head from Ife of "heavily leaded zinc-brass" and the Bronze Head of Queen Idia, both also British Museum, are better described as brass, though of variable compositions.
this close relative of zn is used with nickel UNANSWERABLE how does this metal look like? Zinc is a bluish-white, lustrous, diamagnetic metal, though most common commercial grades of the metal have a dull finish. where can it be found abundantly? Large deposits are in Australia, Canada and the United States, with the largest reserves in Iran. how was it used in the early days of human civilization? Zinc ores were used to make the zinc–copper alloy brass, Judean brass from the 14th to 10th centuries BC contains 23% zinc. is it found in food sources as well? Yes, animal products such as meat, fish, shellfish, fowl, eggs, and dairy contain zinc. can you speak about some popular uses of the alloyed metal you mentioned before? Zinc oxide is widely used as a white pigment in paints and as a catalyst in the manufacture of rubber to disperse heat.
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Brass [SEP] Africa
Some of the most famous objects in African art are the lost wax castings of West Africa, mostly from what is now Nigeria, produced first by the Kingdom of Ife and then the Benin Empire. Though normally described as "bronzes", the Benin Bronzes, now mostly in the British Museum and other Western collections, and the large portrait heads such as the Bronze Head from Ife of "heavily leaded zinc-brass" and the Bronze Head of Queen Idia, both also British Museum, are better described as brass, though of variable compositions. Work in brass or bronze continued to be important in Benin art and other West African traditions such as Akan goldweights, where the metal was regarded as a more valuable material than in Europe.