Russian, 18th/19th century, large rock crystal desk seal of tapering form, faceted sides, the ovoid matrix engraved with monogram, "D.H.", 2-3/4 in., [crystal loss on corners, along facets, residual wax in monogram, heavy grooves and bubbles within rock]; long cut glass seal with faceted sides, rectangular, faceted matrix with carved crown over family crest, 2-1/2 in., [abrasions to glass at tapered facets, glass loss near seal]; cut glass seal with rectangular cut handle on fluted column, the ovoid matrix engraved with monogram, "RB", 1-3/4 in., [abrasions throughout, glass loss near matrix]; small seal in tapering neoclassical form, the ovoid matrix engraved with a crown over monogram, "A.D.", 1-1/4 in., [glass loss at top, near matrix, abrasions throughout]; cut glass seal in fluted cushion form, the ovoid matrix engraved in Cyrillic, 1-1/2 in., [crystal loss along flute and around engraving border, other light abrasions, bubbles within rock]