This 15.13-carat gem shines with an intense, almost neon-like greenish-yellow hue.

Most often seen as fine mineral specimens, wulfenite rarely gets faceted into gems. (Photo: Mia Dixon)

21.79 carats, 16.8 x 16 x 1.05 mm. (Photo: Mia Dixon)

Striking octagon cut 7.8 x 6.26 x 5.5 mm, 2.14 carats. (Photo: Mia Dixon)

Rough measures 7.5 x 1 cm and the 11.32-carat cut stone measures 1.6 x x 9.2 cm. (Photo: Mia Dixon)

An 8.20-carat cabochon cat's eye measuring 12.8 x 12.5 mm and a 4.80-carat kite shape measuring 14.7 x 10.4 mm (Photo: Mia Dixon)

The 6.40-carat yellow sapphire from Sri Lanka rests next to a mountain lily taken from the hills of Pala International's Mountain Lily Mine. (Photo: Mia Dixon)

From back left, 1.56-ct trillion, 2.57-ct round, 1.72-ct cushion, 0.76-ct pear shape, and in front a 1.63-ct round. (Photo: Mia Dixon)

Highlights from the Joe Kast Collection. This collection exhibits a full spectrum of colors from the corundum family and a strong selection of emeralds as well. (Photo: Jason Stephenson)

Vibrant pinkish-red ruby from Burma with GRS cert. This corundum from Burma lies somewhere between ruby and pink sapphire. (Photo: Mia Dixon)

This is a spectacular chrome green tourmaline from Tanzania. (Photo: Mia Dixon)

This impressive pair weighs in at 16.52 carats total weight and are perfectly matched with ideal-cut cushion faceting. (Photo: Mia Dixon)

Exceptional large, clean, blue, cushion-cut zircon from Cambodia. (Photo: Mia Dixon)

Natural pink spinel from Mogok. (Photo: Mia Dixon)

This stone is a beautiful display of tanzanite’s excellence. 

This is a wonderful vintage imperial topaz showing a perfect marriage of red and orange in a clean, large emerald cut gemstone. 

This exquisite Mexican opal was brought and sold to Pala International personally by the opal’s mine owner at the 2012 Las Vegas show.

In the early 2000s, fine rubellites with unique color were mined simultaneously with the various other colors from the Shalawa deposit in Mozambique. 

It's sometimes difficult to find a single taafeite, so this group of graduating sizes is quite a rare sight.

Spinels continue to grow in popularity, keeping demand on the rise.

This pair of stunning aquamarines is from Madagascar. 

These are an orange variety of garnet, but the terminology, deposits, and actual colors are far more complex.