Heliodor is a famous gemstone, a type of beryl mineral group. The name comes from the Greek “helios” – the sun and “doron” – a gift. The color may be yellow, greenish, golden, or orange. Sometimes there are specimens with polychrome colors. Crystals usually have a columnar habit. The presence of good clarity even in large samples is a winning feature of this mineral. Sometimes it may contain gas-liquid inclusions and channels.