Gem Education

04/06/2025

27/02/2025

"Colombo's gem expertise at its finest. "
"From Sri Lanka, with certification. 🇱🇰"

21/01/2025

Internal world of gemstone 💎🔬

19/01/2025

Is Brazilian Emeralds is Green Beryl ???

A Brazilian emerald beryl quartz crystal.
There was a time when emeralds from Brazil were sold as green beryl because they were colored by vanadium instead of chromium like the Colombian emeralds. Eventually researchers from the Gem Trade Laboratory made an announcement on this in 1963. They had come to the agreement that emeralds can be colored by either of the elements or a combination of the two, leading Brazil and possibly other locations to be acknowledged as emerald producers.

This bit of emerald vs. green beryl history does not help with the distinction between the two. Judging based on faint color distinctions can be an arbitrary decision for in-between colors. In addition to Brazil, Zimbabwe and Australia produce green beryl too.

How ever RGTL - Rockland Gem Testing Laboratory is considering this as “ Vanadium bearing Emerald

19/01/2025

Green beryl is not to be confused with emeralds since they are the same gem material colored by the same trace elements (chromium and vanadium). What officially distinguishes emeralds and green beryl is usually their tone, with light green being green beryl, and vivid to dark greens being emeralds.

31/10/2024

What's your pick for Halloween this year?🎃👻

31/10/2024

head of jewelry sales at Christie’s Hong Kong.
(DETAILS are attached Below 👇🏻 the image)

31/10/2024

Microscopic Photography of the Gemstones.
Gem inclusions are mineral crystals or cavities filled with fluid and/or gas that occur in a host gemstone. Many gems contain microscopic inclusions that can reveal much about the host material.
As a result, the use of the microscope (or loupe) to examine these inclusions offers one of the most important methods available for gem identification.

Inclusions are important for determining the natural, synthetic, or treated character of a gem, and for establishing the likely geographic origin of a valuable colored stone. In addition to their usefulness for identification, inclusions cause certain distinctive and desirable optical phenomena such as asterism and chatoyancy, as well as some of the features used in clarity grading.

In this new installment of “Colored Stones Unearthed,” we will discuss inclusions in gems—how they form, how they are studied, and what they mean not only for gemologists but also for geoscientists.

- Rockland Gem Testing Laboratory
www.rgtlgemlab.com
[email protected]
077 612 3411

20/08/2024

“ The internal world of gemstones “ (Dumbbell Like inclusion)
Negative crystal inclusions in sapphire are voids or gas-filled cavities within the crystal structure. Unlike positive inclusions, which are solid particles or other minerals, negative inclusions appear as clear or translucent spaces surrounded by the sapphire's crystalline matrix. These voids can affect the gemstone's clarity and light performance, and may also influence its overall durability