R1: Characterization and description of minerals (Joint Session with The Gemmological Society of Japan)

[R1P-03] An experimental study of Egyptian faience bead

*Yohei Shirose¹, Daisuke Okumura¹ (1. Ehime Univ. Sci)

Keywords:faience, bead, quartz, potassium carbonate

We tried to experimental study of producing a blue faience bead using natural quartz, malachite, calcite, and synthetic K₂CO₃. Products of heating experiments at 850 ℃ were transparent blue material with glassy lustre, and micro pores. XRD analysis data of the products show quartz, and minor wollastonite, tenorite and portlandite. The produced bead has an aggregate texture consisting of 30-50 μm quartz particle filled by K-Ca-Cu silicate.