Quartz rod is a high-performance cylindrical product made of fused silica (SiO₂ ≥ 99.99%). It features exceptional high-temperature resistance (softening point ~1730°C, long-term use at 1100°C), excellent UV-IR transmittance, low thermal expansion, and superb chemical inertness (resistant to most acids except HF). It also offers outstanding e

David Hoffmeister is recognized globally as one of the most prominent teachers of A Course in Miracles (ACIM). A contemporary mystic and speaker, he has spent over three decades traveling the world, sharing a message of profound peace, non-duality, and the practical application of forgiveness. His life serves as a demonstration of what he calls "li