the jewel of the Harrat Khaybar is to be found in its center where lay a very rare kind of volcanoes made of silica-rich called comendite which give them a whitish color. The two largest are the Jebel Abiadh and the Jebel Bayda whose grandiose majesty revealed by satellite images is even more stunning once on site.Jebel Abiadh (literally “white mount”) is the highest crater of the harra with 2093 meters of altitude and the Jebel Bayda (in Arabic the feminine of “white mount”) is the largest with 1,5 kilometers of diameter.As shown on the satellite images the center of the Harrat Khaybar is not only about the clear colors of the white volcanoes as other volcanic formations brought with many shades of other types of lava, ranging from creamy ocher of Jebel Bayda, to shades of red and brown of Jebel Al-‘Aqir, until the deep dark lava flows of Jebel Qidr. The subsequent mixing lava flows created fantastic patterns of shades on the ground in between the craters.The contrast is the most striking where the whitish creamy lava of the Jebel Bayda meets the deep dark one of the Jebel Qidr. A track leads to the edge of both lava flows where it is possible to stand on this volcanic border having one foot on each type of lava.