Jeff's interest range from anything to do with science, the arts, philosophy, writing and much more. He is really a jack-of-all-trades, and probably master of none.
However, working with glass and the arts are probably his main passion.
The Moh’s hardness scale refers to scratch hardness. The resistance of one mineral to be scratched by another.
Friedrich Mohs (1773-1839), a Viennese mineralogist, introduced the term scratch hardness. The scale ranges from the softest at 1 through to the hardest at 10. Gemstones with a hardness of 1 and 2 are considered to be soft, from 3 to 5 medium, with 6 and over considered to be hard.
Because dust can contain quartz, it is important to realise that household dust can damage the lustre and brilliance of gemstones with a hardness below 7. Jewellery set with these stones should be well cared for to maintain their continued brilliance.
This table of Moh’s hardness lists gemstones by name alphabetically.
Some of the gemstone names we commonly use can be very confusing, and often costly to those unaware. For example, ‘Indian Jade’ is actually Aventurine, a form of quartz. The reference to ‘Jade’ is confusing and simply incorrect.
There are many such names that are still in use and you need to be careful when purchasing stones that use common names without referring to the true gemological name.
If you have purchased stones that were advertised using one of these names, the seller may have not know that the name is misleading. They also may have purchased it in good faith. However, often these names are used to confuse buyers and misrepresent stones.
Have a look at this list and you may find a few surprises.
Just want to summarise for you what we have been doing over the last couple of months. Believe me, there has be a lot of that proverbial water go under our bridge. Some crystal clear and good, some not so much. But that’s life and we move on.
We make sure our glass products, Glass Art and Jewellery features, have all been carefully annealed to ensure strength and long life. However, you should care for Glass Art as it is still glass and misuse can result in damage.