California Code
ARTICLE 2 - Structural and Material Requirements of Community Mausoleums and Columbariums
Section 9638.

9638. Material for exterior trim, including exterior crypt and niche fronts, shall be travertine, serpentine marble, or grade A exterior type marble or granite, only.

(Amended by Stats. 1993, Ch. 350, Sec. 19. Effective January 1, 1994.)