What I Have Learned about Paraibas

This blog entry has been a long time coming - I should have written it over a year ago, when I first started buying Paraibas on my inaugural visit in Tucson.

I have seen and admired Paraiba tourmalines ever since I got into the gem business in 2009.  At that point, I knew little about buying and grading gems, but I was already attracted by their neon glow.  I bought one single piece to make a tie bar for my best friend in Germany - I think I paid only about $100/ct to a group of Brazilian guys at a New York Gem show.

Paraiba tourmaline is named after its location, Paraiba, a small town in Northern Brazil.  While tourmaline has been known as a gemstone variety for hundreds of years, this particular vibrant neon variety was only discovered in 1989.  The mine yielded Paraibas for five years, then production stopped and the mines closed.  

What makes Paraiba tourmaline so attractive is its strong blue to turquoise to green and also purple color, caused by the trace mineral copper (I've actually never seen a faceted purple one, not to my knowledge anyway, because I may not have identified it as Paraiba).  Hence the term 'copper bearing'.  Copper bearing tourmalines have since been found in Nigeria, Afghanistan and Mozambique.  But their color is not quite as intense (with Mozambique being the closest).  Often, these other copper bearing tourmalines are also termed "Paraiba" though this is technically false.  "Paraiba color tourmaline" would be more apt.  So when buying Paraibas, it is always worth asking where the gem is from.  Some labs, notably, AGL, can also identify the origin of these tourmalines, though usually pieces larger than 3mm are needed for an origin analysis.  When buying a Paraiba, you should request that the origin is written on the invoice or that it is on the back of the box.  I always have that done.  Also consider working with someone who has a good reputation and if you can, who is a member of the AGTA.  I exclusively buy Paraibas that way.

The single most important factor in pricing Paraiba tourmalines is their color.  The more blue, and the more vibrant, the more expensive they are.  So a vibrant green is less expensive than a vibrant windex blue, with a vibrant turqoise being in the middle.  Even more opaque blue Paraibas can cost more than much cleaner green ones - with much discretion being up to the seller of course.

The photo below shows you four different color grades of Paraiba.  The left two gems are copper bearing but from another location, they show, by comparison at least, a lot more extinction, despite their beautiful color.  The most vibrant gem is the small oval, which also had the highest price tag. The large oval should have cost more because it is also very blue, but it didn't - go figure.  The cheapest was the green pear shape, after that the emerald shape on the right.

Copper Bearing African and Paraiba Tourmaline

Clarity is next in the ranking, though for tourmaline the standards on clarity are pretty low.  Even emeralds are ranked by more stringent standards.

Paraiba tourmaline melee cost approximately 2x as much as diamonds, sometimes 3x as much, in the wholesale market.  Hence the high price tag you see on my blog.  Setting, meanwhile, of Paraiba melee, is difficult.  Pierre, my setter, says it's like setting soap. He's very good and still they crack often.  Softer metal are needed because the way gems are held down is by pushing metal over the gem with sharp tools.  A good eye and steady hands are also needed.  The fact that a lot of Paraiba are included is part of the trouble, inclusions make a gem more brittle and less able to withstand pressure.

Paraiba Tourmaline Cabochons, Including a Rare Cat'e Eye

In terms of Paraiba tourmaline care, avoid ultrasonic if you can.  Some ultrasonic machines contain chemicals that are like acid in their solution, other "shake" so hard that they shatter the gem from within.  So if need be, just a very short bath in ultrasonic is best, and you should always disclose that the gem is a valuable Paraiba.  Steam should be applied from further away - it is very hot (by definition) and high pressure.

And what about availability of the gem, now that the mines are closed?  Well, I do see Paraiba available with many high end dealers in New York (maybe 25% of them).  But there are few pieces, fewer every year, and prices appear to be unlimited toward the top.  Just last week I saw two pieces that were over 100K.  Pretty they were.  One was mostly big - a high domed cab with ridiculous color.  The other was a several carat windex blue faceted oval.  Maybe I can sneak some shots for you in Vegas in early June.

Here are some Paraiba Tourmaline Designs I've made in the last 2-3 months:

Designing Halos with Melee Gems

In the past year, my business has increasingly developed toward custom projects and quotes.  This brings with it a lot of design challenges, and in order to simplify matters a bit on my end, let me share with you some useful information about gemstone melees and how to think about designs involving them.  A melee is considered any gem that is 3mm and smaller. 

First, note that not all gems come in all sizes.  For anything under 1mm, there are really just diamonds available.  Most colored stone melees come in 2mm and up, sometimes 1.5mm and up, and not everything comes in melee.

To calculate the weights of diamond melee, you might use a chart like this one:

Colored gems are often a little bit deeper and a little bit denser in their structure, so they weigh more, too.  The most easily available colored stone melee are sapphires and rubies, but as you know from my shop I also have many others: aquamarine, zircon, mandarin garnet, color change garnet, spinel, tsavorite, mint garnet, peridot, tanzanite, chrysoberyl, among others.  I collect melees because I use them a lot in designs, but for the most part, they are not readily available on the gemstone market.  I don't have all of these in all sizes so you'll have to ask.  Some are hard to replace (i.e. chrysoberyl) and lucky buys, others (sapphires, ruby, tanzanite) I can get almost all the time.

Setting:  the most common setting styles for melees is pinpoint and pave (especially the smaller sizes).

1. Pinpoint setting: this is easier and faster for a setter, hence cheaper - tiny prongs are directly entered into the CAD file.  But making a CAD model with ooodles of tiny prongs is time consuming and expensive.  So it's a wash more or less.

Sapphire Ring with Pinpoint Setting

2. Pave setting: this involves drilling individual holes in the metal and shoving tiny beads over the gems.  The risk here is more breakage, and it costs more time (and money).  The CAD model usually involves a flat surface only.  Sometimes we also put the holes into the model (good for bigger melee, like 2mm). This saves a little on metal weights.  There are two basic pave styles:

a) Bright Cut: This involves a straight line of metal on each side of the gem.  This line has a standard thickness of 1mm.  So if you want bright cut pave on your ring shank, you calculate the width of the melee plus 1mm on each side.  So the smallest is 3mm for a shank.  The bright cut can be millgrained, which is very common these days.  Millgrain often costs a bit extra.  

b) Cut down: this involves no rim, the sides of a ring shank (or halo) are cut down into little scoops with a resulting look almost like prongs.  Cut down pave will look like "all diamond" from the top, so a 3mm ring shank will need 3mm gems, and from the top you will basically just see gemstone and a little bit of prong.  Cut down pave can be expensive because you need bigger stones for a good look, but you can also do a very fine shank with 1mm gems that looks like all diamond.  There are different forms of cut down styles, the one pictured here is a simple scoop, but there are others, like fish tail, or Tiffany style.  You can google them on the web.

Paraiba Tourmeline Ring with Diamond Pave and Millgrain

Closeup of Cut Down Pave with Millgrain

Mint Garnet Ring with Cut Down Pave

Close Up of Cut Down Pave

Note that jewelry design is three dimensional, so you also need to consider the depth of a stone.  On average, a gem is 2/3 as deep as it is wide.  So a 1mm gem is .66 deep.  That's the depth you need for the shank in that case.  Colored stones are deeper.  As a result, you may need almost 3mm depth for a 3mm colored gem, and that makes for a very thick ring or pendant.  In a pendant with a larger center this is less noticeable but a ring shank that is too thick may look weird.

Now let's talk about halo styles more specifically.  A halo is a ring of melee (usually diamonds) around a larger center stone.  Halos add a lot of sparkle, an extra color, and generally enhance the look of a gem.  Standard halos are about 1mm or smaller in size because of the diamond cost.  But you can also go larger for a different look.  The trick is knowing how many gems of what size can fit around a center stone.  Here are some layouts we did for you to see how many options there are for just rounds and ovals (and only a few diamond sizes):

Round Melee Layout

Here's the downloadable layout sheet for you.  The sheet will print out to scale so you can lay gems on it upside down to see which layout they fit.  Printable Round Melee Layout Sheet

Oval Melee Layout

Here's another downloadable layout sheet that will print to scale: Printable Oval Melee Sheet

The next thing you should do is calculate the cost of your halo.  You do this by adding up the total carat weight of the diamonds you use, once you know the gem size you want.  Then you need to know the per carat price of the gems you are using, which is why I've added a rough guide below.  Most colored stones are not very expensive and much of the price is the cutting cost.  Diamonds are another story.  This is a table with two prices, slightly lower end and more fine quality goods.  For up to 2.5mm or just above, prices are usually the same per carat.  3mm involves a price jump.  I have calculated this at my standard markup, so other sellers may have different prices.

F/G Color VS Quality, Swiss Cut	G-H Color, SI Quality, Standard Cut
Below 3mm: $1800/ct Retail	Below 3mm: $1400/ct
3mm: $3600/ct	3mm: $2500/ct

Is there more you'd like to know?  Do you have suggestions for blog entries that help your design efforts?  Please let me know here in the comment box, via FB or Etsy.  I'd love to hear your suggestions.

My thanks to Brandy Belenky, my CAD designer, for helping me with this entry and doing the layouts.

Stone Setting by Pierre

I am slowly learning how to add little video clips to my blog so here is my first one.  It was my practice piece but then I thought it came out nice enough to share.  In this video, Pierre explains how he is prong setting 3mm diamonds into a diamond eternity band.  First he opens the ring up underneath, then he drills the seat, pops in the diamond and gently pushes the prongs over the stone.  They pop into place perfectly.  And the end, Pierre shapes the prongs into perfectly round little “balls” for an even appearance.

As most of you already know, there are many different kinds of setting techniques, and each takes a separate set of tools and a separate skill set.  Simple prong setting is the easiest, and it is least harmful to the stone.  In his office, Pierre is equipped with a huge microscope, flex shafts, beading and millgrain tools, clamps of all types, ultrasonic, and who knows what else.  To be fully equipped, especially for setting micro pave under a scope, you need to invest several thousand dollars.

Pierre has been in the jewelry trade since he was 14, and has decades of experience just setting stones.  Still, some of my gems present unique challenges to him.  Most setters set diamonds, or rather, most of what is set in industry are diamonds, and those are hard to break.  Many colored gems can get scratched or chipped by the tools that are needed to push the metal over the gem and file down the prongs, so a very steady hand is needed, and gems do break on occasion.  That’s why setters do not guarantee the stones they set.  Too much risk is involved and insurance is crappy and expensive.  It is therefore best to go over your project with the setter carefully, making sure the gem can withstand the tools that are needed for the particular setting job.  Gems are inspected for inclusions or cracks which can present additional risks.

Another challenge is getting a tiny piece of jewelry to stay in place and not bend or move while the setter works on it.  Rings are the easiest because you can put them into the clamp, but pendants sometimes have to be set in shellac, or setting cement, a wax like substance that melts when warmed up.  To remove the shellac, the jewelry piece has to be warmed up in water and then cleaned in the ultrasonic.  Sometimes stones break during that process – I once had an aqua pendant that cracked because it got overheated while the shellac was being removed.

An image of Pierre and I my assistant took while i was shooting the above video :) 

Customers often wonder why setting costs so much.  One reason is the equipment, plus there is the rent on 47^th street that has to be paid (figure on maybe $2000 a month for a small office).  And then it takes time.  Setting a pair of earrings may take only 10 minutes, but pave setting an entire ring can take an afternoon.  So if a setter charges $300 for that job he is within his rights.   I generally pay gladly for good work, but for my markup it presents a problem of course.  Technically, the setters I use make jewelry that goes for thousands of dollars, not hundreds, and so the setting cost can be more easily absorbed.  On the other hand, I find nice setting work addictive, and I like my gems to be hugged by prongs that got filed down into tiny claws, or perfectly rounded so they look like beads (you can see how that works in the video).