Zahab means gold. It appears about 390 times. Gold represented the highest value, purity, and glory in the ancient world. It was used extensively in the tabernacle, temple, and priestly garments.
Gold symbolizes divine glory, purity, and supreme worth. The tabernacle and temple were overlaid with zahab as God's dwelling. Yet wisdom is declared more valuable than gold (Proverbs 8:19), and faith tested by fire is 'more precious than gold.' The streets of the New Jerusalem are gold.