Guaiacum uses, including as lumber, for medicinal purposes, and as ornamentals. The trade of all species of "Guaiacum" is controlled under CITES Appendix II. "Guaiacum officinale" is the national flower of Jamaica, while "Guaiacum sanctum" is the national tree of the Bahamas. The genus is famous as the supplier of lignum vitae, which is the heartwood of several species in the genus. It is the fourth-hardest variety of wood as measured by the Janka hardness test, requiring a force of to embed a steel ball in diameter half that distance into the wood. The Spanish encountered guaiacum wood when they conquered
Janka Kulcsár the next year, she won a prize in the National Chamber Music Competition. Kulcsár works mainly with singers. She accompanied Marianna Sipos in the ARD International Music Competition in 2012. Founding member of the Moltopera Company since 2011. She accompanied among others Moltopera's production Don Giovanni, Magic Flute (in the Palace of Arts), Fledermaus, La Bohéme, Cavalleria Rusticana, Menotti's: The telephone, L'enfant et les sortiléges (in the National Theater of Pécs), and "How to survive an opera recital?" (in the Sziget Festival). Janka Kulcsár Janka Kulcsár (born 8 April 1985) is a Hungarian pianist and répétiteur, and a founding member