ruby; a red variety of transparent corundum noted for its extreme hardness and used in jewelry or precision instruments

Any transparent variety of corundum besides red; typically blue but can be other colors, used in jewelry or as bearings for precision instruments.

beryl (gemstone), including various colored varieties such as golden or rose beryl, but often specifically referring to the green variety

precious stone consisting of hydrated silica, typically semi-transparent and showing many small points of shifting color

A 40th wedding anniversary

semiprecious stone; a mineral that is less valuable than a precious stone

forty-fifth wedding anniversary

person who cuts, polishes, or engraves precious stones or a jeweler

(variant form) Baochu Pagoda, a historic slender stone pagoda located on Precious Stone Hill in Hangzhou, Zhejiang Province

A term for the 45th wedding anniversary in Western tradition; sometimes used to refer to the 40th wedding anniversary [[红宝石婚|紅寶石婚|hong2 bao3 shi2 hun1]] or 45th [[蓝宝石婚|藍寶石婚|lan2 bao3 shi2 hun1]] specifically.