Pronunciation: [dɪmˈantɔ͡ɪd] (IPA) 
Demantoid is a type of green garnet gemstone. The word is spelled as "dɪˈmæntɔɪd". The first sound "dɪ" makes the short "i" sound, followed by "mæ" pronounced as "mae" with the "ae" making the "e" sound as in "bed". "nt" is pronounced as it appears - "nt". "ɔɪ" creates the "oi" sound as in "coin". "d" at the end of the word is stressed, meaning it is pronounced heavily than the other sounds in the word.
Demantoid is a rare and precious gemstone renowned for its exceptional brilliance, vibrant green color, and high level of dispersion. It is a variety of the mineral andradite, which belongs to the garnet family. This gemstone is named after the Greek word "diamond," reflecting its diamond-like luster and exceptional brilliance.
The defining characteristic of demantoid is its intense and vivid green hue, which is often described as a "spring grass green" or "emerald green." This vibrant color can be attributed to the presence of chromium in its chemical composition. Demantoids with a deep green color and strong saturation are considered the most valuable and desirable.
Another notable feature of demantoid is its exceptional brilliance and dispersion. It possesses a high refractive index, meaning it has the ability to bend and reflect light, resulting in a dazzling display of fire and brilliance. This gemstone's impressive dispersive properties cause it to exhibit spectral colors when light passes through it, making it display more color than other gemstones.
Due to its rarity and remarkable beauty, demantoid is highly sought after by gem collectors and enthusiasts. It is usually faceted into various shapes to maximize its brilliance, and larger specimens are exceptionally rare. Demantoid is generally found in limited quantities in select deposits around the world, including Russia and Namibia.
Overall, demantoid is a prized gemstone valued for its distinct green hue, outstanding brilliance, and exceptional dispersion, making it a highly desirable addition to any gem collection.
The word demantoid is derived from two parts: demant- and -oid.
The first part, demant-, comes from the German word Demant, which means diamond. This is because demantoid is a green gemstone of the garnet family that exhibits a brilliance and fire comparable to that of a diamond.
The second part, -oid, is a suffix used in English to indicate a resemblance or likeness to something. In this case, it shows that demantoid gemstone bears some resemblance or similarity to a diamond.
Overall, the etymology of demantoid can be understood as resembling a diamond.
