 The Blue Heart Diamond was donated by Mrs. Marjorie Merriweather Post in 1964. |  Platinum bracelet with 31 antique-cut Burmese rubies totaling 60 carats. |  The DeYoung pink diamond |
 The Chalk Emerald ranks among the world’s finest Colombian emeralds. The 37.8-carat emerald exhibits the prized velvety deep green colour. |  The 98.57-carat Bismarck Sapphire is mounted in a platinum necklace designed by Cartier, set with 312 baguette and round brilliant cut diamonds and accented with 8 square-cut sapphires. |  Ring features an emerald-cut diamond of 5.32cts with a step-cut blue sapphire of 8.12cts. |
 Heart-shaped brooch has a 96-carat amethyst surrounded by diamonds. |  The Hall Sapphire Necklace, designed by Harry Winston, Inc., features 36 cushion-cut sapphires from Sri Lanka, totaling 195 carats, set in platinum accented by 435 pear-shaped and round brilliant-cut diamonds, totaling 83.75 carats. |  These two large, pear-shaped diamonds weigh 14.25 and 20.34 carats respectively are set in earrings that belonged to Marie Antoinette, the Queen of France who was guillotined in 1793 during the French Revolution. |
 Elbaite candelabra (Tourmaline family) |  Liddicoatite with a zoned green and pink interior from Antsirabe, Madagascar |  Beryl with Quartz - Blue beryl crystal on microcline. |
 Pear-cut ametrine from Brazil |  Uncut diamond crystal from Arkansas | 
Calcite with Pyrite - From Brush Creek mine, Reynolds County, Missouri. |  The 58.19-carat Maharani Cat’s Eye from Sri Lanka is one of the finest gems of its kind |
 Octagonal-cut amethyst |  A round brilliant-cut citrine. |  Clinohumite is a magnesium silicate |  Orthoclase belongs to the feldspar family. |
