Pronunciation: [dˈakɹɪˌɒla͡ɪt] (IPA) 
Dacryolite is a mineral composed of hydrated calcium borate. Its spelling is derived from the Greek words for "tear" and "stone". The IPA phonetic transcription for Dacryolite is /dækriəlaɪt/, with emphasis on the second syllable "ri" and "la" pronounced as one syllable. The "y" in Dacryo represents the Greek upsilon (υ) and is pronounced like the English "u" sound. The end of the word "-lite" is pronounced as "light".
Dacryolite is a term with two distinct definitions depending on the context in which it is used. In the fields of mineralogy and geology, dacryolite refers to a rare and translucent mineral that belongs to the zeolite group. It is composed of hydrated calcium and aluminum silicate, often with small traces of sodium. Dacryolite typically occurs in radiating clusters of flattened or elongated crystals, displaying colors ranging from colorless to pale yellow or green. Its name is derived from the Greek word "dakruon," meaning tear, due to its tear-like appearance when found in certain formations.
On the other hand, in medicine, dacryolite refers to an abnormal concretion or calcification that develops within the lacrimal system, specifically in the lacrimal sac or ducts. These structures are responsible for the production, drainage, and distribution of tears. Dacryolites in this context are masses composed of precipitated salts, proteins, and other substances that can obstruct or block the normal flow of tears. This condition, known as dacryolith, often leads to symptoms such as epiphora (excessive tearing), redness, and discomfort around the eyes. Surgical intervention might be required to remove the dacryolite and restore proper tear drainage.
In summary, dacryolite refers either to a mineral in the zeolite group with tear-like crystal formations or to abnormal calcifications or concretions within the lacrimal system causing obstruction of tear flow.
The word "dacryolite" is derived from the Greek words "dakryon" meaning "tear" and "lithos" meaning "stone". The term was coined in the early 19th century to describe a mineral that resembled teardrops due to its shape and transparency.
