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Unakite        
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Understand mm sizes:

Quick guide:

 1" = 25mm

1/2"=13mm

1/4"=6.5mm

Change can help:

1 quarter= 24.2 mm

1 dime= 18mm

Both coins: 42mm

 

It was only after I returned from Tucson and was admiring my purchases that I realized that I had acquired quite a few incredible black stones that merited a page of their own. Although they are all black, many of them shimmer and change when exposed to bright light. I have tried to capture their surprising patterns and colors wherever I could.

   On this page:   Rainbow Obsidian     Velvet Obsidian     Botryoidal Hematite    Black Onyx      Fossilized Palm       Meteorites     Psilomelane


Next page: Black in the abstract     Previous page: Art-carved Gems

Psilomelane

This arresting stone reminds me of a summer thunderstorm at night when the inky blackness is suddenly lit by flashes of lightning. That's what happens as you move and turn this stone: Beautiful patterns of repeating stripes or streaky clouds are lit up, then disappear into patent-leather black, then reappear again. I've added some extra photos to illustrate this effect.  Under halogen light, these pieces have a distinctly warm, almost bronzy sheen. All of the front faces are polished, but most still retain a slight texture characteristic of this stone, which looks soft but is actually very hard and durable. From the collection of Gary Wilson. Unpolished backs.

Hypersthene Feldspar     Quebec, Canada
This one is amazing: The entire front face features shimmering stripes. 66.5 x 27.5 mm  

BK370     $80.00


 

 

 

 

 

 

Hypersthene Feldspar     Quebec, Canada
44 x 28.5 mm   (shown under photo floods and then halogen)

BK375     $46.00   


 

 

 

 


Hypersthene Feldspar    
Quebec, Canada
31 x 21 mm  

BK383     $50.00


   

 


 


Hypersthene Feldspar    
Quebec, Canada
This one is really lovely, with continuous gleaming stripes against rich black. 31 x 21.5 mm  

BK377     $46.00


   

 

 

The following two stones can be purchased individually, or, save by ordering them as a pair (option BK374 A+B). Their patterning is reminiscent of wood, with concentric rings of chatoyance. Note: I separated these two stones because they would be pretty heavy for earrings, except as clips. 


Hypersthene Feldspar    
Quebec, Canada
33.5 x 16 mm  
BK374A     $40.00


   


Hypersthene Feldspar    
Quebec, Canada
33.5 x 16 mm  

BK374B     $40.00


   


Hypersthene Feldspar Pair    
Quebec, Canada
33.5 x 16 mm each

  
BK374A+B     $72.00


   


 


Hypersthene Feldspar Pair    
Quebec, Canada
14.5 x 9.5 mm  

BK380     $38.00


 


Hypersthene Feldspar    
Quebec, Canada
21.5 x 9 mm  

BK381     $22.00


    

 

SPECIAL VALUE: Hypersthene Feldspar     Quebec, Canada
The flaw on this piece, a small natural cleft along the bottom right edge, is so insignificant in comparison to the full-on gleam of the face that I probably could have gotten away without marking it down, but I'm a perfectionist, so I did anyway. Easily covered by a bezel strip. 38 x 37 mm  
BK372     $58.00     reg. $64.00


 

 

 

 

SPECIAL VALUE: Hypersthene Feldspar     Quebec, Canada
I didn't notice this when I purchased the stone, but it has an 8x11mm area in the upper right corner that is flattened and less polished than the rest of the front face. It probably sat lower naturally, so the buffing wheel missed it. A fabulous value if you have a polisher available. 51.5 x 29.5 mm  
BK376     $46.00     reg. $62.00


 

 

 

 



Psilomelane

This intriguing stone is more a charcoal grey than pure black, and some pieces are partially translucent. But its most salient feature is the confetti-like sprinkling of silvery pyrite throughout the stone and across its surface. The larger bits of pyrite catch the light and gleam, while the smaller flecks twinkle as you move the stone. Plus, it's quartz, with all of quartz's positive features, including hardness and durability. Note: Due to the reflectiveness of these stones, they are very difficult to photograph. Your best bet is to picture all the white and light grey speckles as silver, because that's how they look in person.

                     

Pyrite in Quartz     Mexico
25.5 x 14.5mm   polished back

BK266     $20.00


 


Pyrite in Quartz    
Mexico
33.5 x 15.5mm   polished back

BK269     $18.00


 


 



Pyrite in Quartz    
Mexico
25 x 17mm  satin-finish back

BK307     $22.00


 


Pyrite in Quartz    
Mexico
25 x 17mm  satin-finish back

BK312     $22.00


 


Pyrite in Quartz    
Mexico
19.5 x 13.5mm pair satin-finish backs 

BK314     $30.00


 


Pyrite in Quartz    
Mexico
30 x 20mm  satin-finish back

BK319     $34.00


 

 

 


Pyrite in Quartz    
Mexico
33 x 22mm   satin-finish back

BK320     $34.00


 


Psilomelane

Obsidian is natural glass, formed when lava from volcanoes cooled very quickly.  These obsidians contain natural iridescent colors that flash and shine when the stone is moved in the light. They are the result of the "depositional banding" or layering of various types of microscopic feldspar or mica crystals lined up just right within the glass. In dim light, these stones appear black, but in stronger lights, they just shine. Adding to their interest is the wonderful carving, done by artisans in Jalisco, Mexico, where the stone is mined. The combination of color patterns and individual carving makes each stone unique.   Doug has photographed these to show off the colors. Turn the stone, and it becomes black. Click on the photo to see the stone better.  These are all that I currently have in stock.


Carved Rainbow Obsidian   
Mexico
42.5 x 18.5mm

BK291    $50.00 



 

 

 


Psilomelane

 

First cousin to Rainbow Obsidian, the colors in Velvet Obsidian are primarily pinky bronzes, golds and greens. They show up in folded swirls of color, rather than rainbow stripes, and do resemble crushed velvet. These particular stones are especially exciting because their color is more evident than usual. Note: These stones were photographed under bright light. Colors are less pronounced in shadow.

Velvet Obsidian     Mexico
48 x 29mm  

BK339     $50.00 


 

 

 

 


Velvet Obsidian    
Mexico
40.5 x 27mm  

BK342     $46.00   


 

 


 


Velvet Obsidian    
Mexico
33.5 x 30mm  

BK343     $40.00    


 

 

 


Velvet Obsidian    
Mexico
33.5 x 25mm  

BK344     $36.00    


 

 

 


Velvet Obsidian    
Mexico
38.5 x 16mm  

BK346     $28.00    


 

 

 


Velvet Obsidian    
Mexico
32 x 20mm  

BK347     $30.00  


  

 

 


Velvet Obsidian    
Mexico
33 x 17mm  

BK348     $28.00    


 

 

 


Velvet Obsidian    
Mexico
34 x 22.5mm  

BK350     $30.00    


 

 

 


Velvet Obsidian    
Mexico
34 x 25.5mm  

BK351     $32.00  


  

 

 


Velvet Obsidian    
Mexico
30 x 21mm  

BK358     $22.00    


 

 

 

Not shown, but oval shape like BK358 with bronze velvet swirls:


Velvet Obsidian    
Mexico
18.5 x 14mm  

BK360     $10.50    


 


Velvet Obsidian    
Mexico
26.5 x 15.5mm  

BK359     $14.00    


 

 


Psilomelane

From the windblown stretches of the Sahara comes this hematite, all bumpy and interesting and shimmering with a metallic sheen. It's called "bot·ry·oi·dal " which comes from the Greek, "shaped like a bunch of grapes."  Keep in mind that, as hematite, it's a bit heavier than most stones of comparable size.  Note: This is my full supply of these. Click on photos for a closer look.

Botyroidal Hematite Pendants

These gorgeous, hefty pieces are top-drilled with a jump ring, to which you can attach your favorite bail. Unpolished but smooth backs.


Botyroidal Hematite Pendant    
Morocco
31 x 23 mm, 13 mm thick  

BK304     $32.00


 

 

Botyroidal Hematite undrilled cabs


Botryoidal Hematite  
 Africa
27 x 17 mm, 6.73 g

BK197    $14.99



 

 


Botryoidal Hematite  
 Africa
24.5 x 27 mm, 20.68 g

BK202    $21.00

 

 


Psilomelane

I'm pleased to be able to now offer more Black Onyx in new attractive sizes and shapes. These stones will bring elegance to any setting. Real Black Onyx has become fairly rare in the gem world, and the term "Black Onyx" now usually refers to dyed agate. The dye is permanent and permeates the entire stone, not just the surface. These stones are so gorgeous, you'll forgive their being dyed.

Black Onyx Drilled Pendants
You would be hard-pressed to find such elegant, versatile pieces at such affordable prices. These are all about 8mm thick, laterally drilled (side-to-side), and all sides have a high polish. The fronts and backs are ever so slightly convex, giving them a really classy look. The holes will accept an 18-gauge wire.


Black Onyx Drilled Pendant    
Brazil
40 x 13 mm  

BK326     $22.00


 

 

 

 


Black Onyx Drilled Pendant    
Brazil
35 x 13 mm  

BK327     $22.00


 

 

 


Black Onyx Drilled Pendant    
Brazil
36 x 20 mm  

BK328     $24.00


 

 

 


Black Onyx Drilled Pendant    
Brazil
20 x 20 mm  

BK331     $16.00


 


Black Onyx Drilled Pendant    
Brazil
24.5 x 9 mm  

BK332     $14.00


 

 

Black Onyx   Brazil
17 x 9mm
BK274   $14.50   5 pair available

Quantity:



 

Black Onyx    Brazil
20 x 13.5 mm pair
BK90   $15.99    3 pair available

Quantity:



 

Black Onyx    Brazil
16 x 12.7 mm pair
BK107    $19.99   1 pair available

Quantity:


 

 

Black Onyx    Brazil
16 x 12 mm pair (photos show two possible arrangements of this pair)
BK103    $18.50    2 pair available

Quantity:



 

Faceted Black Onyx Cushion Pair    
12 x 12mm  

BK369     $9.99  for the pair    15 pair available  

Quantity:



Psilomelane

This material is real fossilized palm, although it is most likely dyed. From a distance it looks black, but under strong light it is a dark chocolate brown with dots of black. Stones are all polished.  More Fossilized Palm coming soon!

Fossilized Palm    Pacific Rim
The black dots in this piece are arranged in diagonal rows and reflect back a metallic black. 29 x 29 mm triangle
BK164    $22.50 



 


Psilomelane

This wonderful stone (pronounced si-lah'-mi-lane) is a type of manganese ore. It has the look of shiny dark hematite, but with beautiful banded patterns of pure black. It is very messy and dirty to cut, and most stone cutters shy away from it, so finding such lovely pieces is pretty rare. But we're lucky because lapidarist Pat Ruhnke is still willing to bring beauty out of the mess. I edited the photos of these pieces so as to show off their patterning, but in person, they are patent-leather black with silvery black stripes and swirls. Note: This stone is comparatively soft--Not useable for rings or heavy-wear bracelets. Click on photos to see more detail.

Psilomelane     Mexico
This is a relatively big piece. 50.5 x 17.3mm  

BK192     $68.50


 

 

 


 

Psilomelane     Mexico
21.5 x 17mm  

BK172     $36.00


 

 



Psilomelane    
Mexico
22.5 x 11mm  

BK181     $24.00


 

 


Hematite

This chubby freeform teardrop is not Psilomelane. It's Hematite, but it's the only one I have so I put it here. 21.5 x 16mm

BK191     $32.00


 


 


Psilomelane   

Imagine--Jewelry with stones from outer space! These are genuine meteorite material, part of a new find several miles from the Campo del Cielo meteorite field in Chaco, Argentina. The Campo del Cielo site was originally discovered by Spanish explorers in 1572, but who knows when the original meteors left their wanderings through space and crashed to earth. The larger meteorites in the newly discovered field are in top condition and sell for hundreds to thousands of dollars apiece. The jewelry-sized pieces on this page are from that same location. They are called "exploded meteorites."  Miners cut the larger chunks into slices and explode them apart, creating smaller pieces with fascinating freeform shapes.

The sculptural nature of the pieces suits them ideally to wire-wrapping, but I hand-picked each of these pieces and chose those that had one flat side so that bezel-setters could use them, too. These pieces don't have any jagged edges, so they won't cut or hurt the wearer. Note: Be sure to check out the care directions below for cleaning these pieces and preventing them from rusting.  

Each of these exploded meteorites has been photographed looking down on the stone while it sits on its flat back. Measurements are given in length by width by depth. While the iron content gives these a pleasant heft, none seem to be too heavy for use as pendants. However, if you want to know the weight of any piece, simply e-mail me.  To see more detail, click on photos.

Meteorite    
This is a hefty piece, with real substance. It sits mostly flat but parts of the back are not completely flat. 27 x 17 x 12 mm  

BK255     $28.00


 

 

Meteorite    
22 x 19.5 x 8 mm  

BK243     $26.00
 


 


Meteorite    

21 x 16.5 x 16 mm  

BK222     $22.00  


 


Meteorite    

This one has a cleft down the center, but it's still firm and solid. 35 x 22.5 x 8.5 mm

BK234     $22.00  


  

  

Meteorite    
26.5 x 14.5 x 12.5 mm  

BK218     $18.00  


  


Meteorite    

22 x 16.5 x 7.5 mm  

BK250     $14.00  


 

Meteorite cleaning and care

These Campo del Cielo meteorites are Group I, composed of primarily iron, with a smattering of other chemicals. Like any earthbound iron, they will eventually rust. Collectors protect larger specimens by coating them with gun oil, but this won't work for meteorites to be worn as jewelry. The experts say that if you want to clean your meteorite, use Brasso (metal cleaner) with a soft brush. You can then polish the meteorite to a high gleam if you wish. Then, seal the stone from the oxidizing effects of the air by spraying it with 3 in 1 Silicone Spray. (Both products are available at most hardware stores).  This should protect it for the life of the piece.


Next page: Black in the abstract       Previous page: Art-carved Gems

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