ly ▁the ▁glass ▁is ▁drawn ▁out . ▁ ▁The ▁co o led ▁glass ▁can e ▁is ▁cut ▁into ▁short ▁segments ▁which ▁reve al ▁a ▁star ▁pattern ▁in ▁cross - section . ▁The ▁segments ▁may ▁be ▁be ve led ▁or ▁ground , ▁to ▁reve al ▁the ▁characteristic ▁che v ron ▁pattern ▁from ▁which ▁the ▁English ▁name ▁is ▁derived . ▁The ▁che v ron ▁pattern ▁becomes ▁apparent ▁after ▁the ▁be ads ' ▁ends ▁have ▁been ▁ground . ▁Only ▁ro set ta / star ▁be ads ▁with ▁ground ▁ends ▁( e ither ▁fac et ed , ▁rounded , ▁or ▁cham fer ed ), ▁and ▁with ▁their ▁inner ▁layers ▁exposed , ▁are ▁" chev ron " ▁be ads . ▁All ▁star ▁be ads ▁with ▁flat ▁ends ▁are ▁more ▁apt ly ▁term ed ▁ro set ta / star ▁be ads . ▁ ▁Most ▁of ▁the ▁Ven et ian ▁che v ron ▁be ads ▁made ▁for ▁export ▁to ▁West ▁Africa ▁and ▁to ▁the ▁Amer icas ▁have ▁layers ▁in ▁red , ▁blue , ▁and ▁white . ▁ ▁A ▁smaller ▁number ▁of ▁che v ron ▁be ads ▁were ▁produced ▁with ▁other ▁colors ▁such ▁as ▁green , ▁black ▁and ▁yellow . ▁Ven et ian ▁che v ron ▁be ads ▁have ▁been ▁trad ed ▁throughout ▁the ▁world , ▁most ▁heavily ▁in ▁West ▁Africa , ▁where ▁they ▁were ▁first ▁introduced ▁by ▁Dutch ▁mer ch ants ▁in ▁the ▁late ▁ 1 5 th ▁century . ▁ ▁Some ▁very ▁small ▁s ized ▁ 7 ▁layer ▁Ven et ian ▁che v ron ▁be ads , ▁also ▁made