Basalt rocks are used to produce basaltic fibers, which are used for several industrial purposes, the most important of which are construction industries. These fibers have excellent mechanical properties, high resistance to chemicals, thermal stability, good resistance to moisture, and are eco-friendly due to the fact that it is easy recyclable. This study aims to evaluate basalt rocks in the volcanic field (Balhaf – Bir Ali) in Shabwa Governorate on the coast of the Arabian Sea, to determine the possibility of using them in the manufacture of basaltic fibers. 13 representative basalt rock samples were collected from Balhaf field, Bir Ali, and were chemically analyzed by X-ray fluorescence (XRF) method. The results of the analysis showed that basalt rocks in this field are alkaline rocks, where the percentage of alkali (Na2O + K2O) ranges from 4-8%, the percentage of silicon dioxide (SiO2) from 45.97 – 50.97%, the percentage of aluminum oxide (AL2O3) from 15 – 17.8%, and the percentage of magnesium oxide (MgO) from 4.21 – 10.46%. Evaluation criteria such as acidity (MK) and viscosity (MV) were calculated by chemical analysis results. The results of the chemical analyses showed that the majority of these rocks are characterized by a high melting point and low viscosity, where the pH standard ratios ranged between 2.04 – 3.19%, and the viscosity standard ratios ranged between 1.49 – 2.22. These calculations indicate that they can be used in the manufacture of basaltic fibers. | :Key Words · Basalt· Bir Ali.· Balhaf· Shabwa· Arabian Sea |