Try adding a multi spectrum incadecent bulb to your lighting system. Advoide older florscent bulbs as they may affect the true color of the beads. What type of light source do the jewelry stores use. When I photograph items I use a light-box and position a defused light source from above and incude defused light from the sides. I use a full spectrium spotlight above, a 100 watt incadecent blub, and/or a newer CLF florcent bulb along with a defused flash. I hope this helps! ~Gary Parker