December Blues

Day 71: If you were born in the month of December, you are more fortunate than most when it comes to a selection of birthstones. There are three choices: blue zircon (if your taste runs to faceted stones), turquoise (for a more earthy look) and the classic elegance of lapis lazuli.

I bring this up because a friend just asked me if I could verify that a piece she owns is in fact lapis. I have not seen it yet, but I did advise her that there are a number of imitators (most notably, dyed howlite), but all lack the telltale flecks of pyrite which distinguish much true lapis. Lapis aficionados will argue whether or not pyrite is desirable and to my way of thinking, it's a matter of personal preference. I like it. On the other hand, the stonecutter is more likely to say that good lapis excludes pyrite because it makes it more difficult to grind and polish due to undercutting of the softer material.

I sold my rockhounding gear years ago after deciding that creating cabochons such as these was not worth the hours spent with wet, cold hands, but I kept much of my more valuable rough including a stash of genuine lapis. In any event, I seldom wear jewelry and get more pleasure from seeing the raw minerals in my collection.

Lovely Lapis Lazuli

Day 353: My interest in rocks began at a very early age, and by the time I was nine years old, I had a mineral collection which (to my mother's dismay) covered the top of my dresser. Each specimen was labelled with what I believed it to be (often erroneously) and where I had found it. As I grew to be an adult, I developed an interest in stone-cutting as an adjunct to rockhounding, and was not content to work simply with slabs of agate or pieces of Australian opal. One of my favourite stones was lapis lazuli.

Lapis is somewhat difficult to work. Pyrite inclusions are desirable; veins of quartz are not. Both create problems for the lapidarist in that they are softer or harder than the blue matrix material. I was quite proud of the uniform finish I achieved on this particular stone (a 20 x 30 mm. cab).

Fake lapis abounds in the jewelry market. Most often, it will be blue-dyed howlite. However, although howlite also contains quartz, it never contains the pyrites which typify true lapis.