In a previous color, we’ve talked about what makes things colored — the way objects absorb, reflect, or transmit light at different wavelengths. But let’s be a bit more specific. What gives gemstones ...

The stone appears green or blue in daylight or fluorescent light. In incandescent light, it is red or purple. The gem takes its name from Emperor Alexander II of Russia , the Geological Institute ...

Not every bride prefers a traditional diamond. More couples today are choosing engagement rings that feel personal and ...

Gemstones News: Who should wear a Blue Sapphire - The gemstone with a light blue hue – the Blue Sapphire or Neelam stone catches the fancy of many. This hard gem holds answers to many problems ...

The star effect is created by rutile, a mineral in the gem, reflecting light in a star pattern, a phenomenon called asterism. The DeLong Star Ruby — The 100-carat stone, which also has a star ...

Post traced the history of the gemstone, tracking it from its origin point in India to a gem dealer who in 1668 sold it to Louis XIV, and its subsequent cutting into the “French Blue” to its ...