Thursday, May 3, 2012
SABOS Spring Bead & Jewelry SHow
Friday, April 13, 2012
Thursday, April 5, 2012
2012 FIESTA SAN ANTONIO ! - April 19th - 29th
Thursday, March 22, 2012
PEDDLER's SHOW - Fredericksburg, TX
Wednesday, March 21, 2012
Topaz Day - Mason, Texas 24-25 March
Monday, March 19, 2012
Texas Topaz Day - Mason, Texas - Mar 24-25, 2012
This coming weekend the Southwest Gem and Mineral Society in San Antonio and the World Gem Society invites everyone to come to Mason, Texas, to join in the Texas Topaz Day festivities on Saturday, March 24th, followed by the Texas Faceters Guild Seminar Day on Sunday, March 25th. Mason, Texas, right in the heart of the Texas Hill Country is located in some of the most interesting geological formations to be found anywhere in the world. The festivities and events start at 10:00 am on Saturday and run all day with gemstone cutting and faceting demonstrations, jewelry and arts shows, and contests and music events to cap off the day. Then on Sunday you can join the Texas Faceters Guild for a day of learning about the latest in gemstone cutting and faceting. From novice to expert all are welcome. .
Monday, February 27, 2012
"Benitoite" - the Blue Diamond of California !

Tuesday, February 7, 2012
DIAMOND SIMULANTS !
I have been recently asked if I can again list what Diamond Simulants are on the market today and how do you tell if you have a simulant or real diamond. The problem is, new ones are appearing at regular intervals and it is very hard to stay current. Well the oldest test, but not totally conclusive is to run the diamond (or rock) across a piece of glass and if it scratches it, it is probably a diamond. As seen on TV you could hit it with a steel hammer ,and if it isn't ruined, it may be a diamond. Yea, but what jeweler or vendor in his or her right mind is going to let you do either of those two tests. So your best bet is to completely trust your gemologist or jeweler that what you are being sold is genuine. And if you bye a diamond from someone you don't know, you probably better make sure you can return it, because if you have it tested and find it is not a diamond, you want some recourse on what you spent. And of course the best saying is, "If it is too cheap for what it is suppose to be, it probably isn't what it is advertised to be!" The following is a chart of some simulants if you want to test for yourself..
Common Diamond simulants and their gemological properties
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Material. Formula..Refractive Index.Dispersion.Moh's Hardness.Density.Thermal.Cond
Artificial Simulants:
Glass.......Silica...............~ 1.6................> 0.020.............6.............2.4-4.2........Poor
Spinel...MgO·Al2O3.........1.727.................0.020............8................~ 3.6..........Poor
Rutile......TiO2.................2.62 ..................0.33.............~ 6................4.25.........Poor
Strontium Titanate.SrTiO3.2.41................0.19.............5.5...............5.13.........Poor
CubicZirconia.ZrO2.......~2.2....................~0.06..........~8.3..............~5.7..........Poor Moissanite....SiC..............2.648................0.104...........8.5...............3.2..........High
Natural minerals that (when cut) optically resemble white diamonds are rare, because the trace impurities usually present
in natural minerals tend to impart color. The earliest simulants of diamond were colorless quartz, topaz and beryl (goshenite); they are all common minerals with above-average hardness (7–8), but all have low RIs and correspondingly low dispersions. Well-formed quartz crystals are sometimes offered as "diamonds," a popular example being the so-called "Herkimer diamond". Topaz's SG (3.50–3.57) also falls within the range of diamond..
From a historical perspective, the most notable natural simulant of diamond is Zircon.
It is also fairly hard (7.5), but more importantly shows perceptible fire when cut, due to its high dispersion of 0.039. Colorless zircon has been mined in Sri Lanke for over 2,000 years; prior to the advent of modern mineralogy, colorless zircon was thought to be an inferior form of diamond. It was called "Matara diamond" after its source location. It is still encountered as a diamond simulant, but differentiation is easy due to zircon's anisotropy and strong birefringence (0.059). It is also notoriously brittle and often shows wear on the girdle and facet edges. Much less common than colorless zircon is colorless scheelite. Its dispersion (0.026) is also high enough to mimic diamond, but although it is highly lustrous its hardness is much too low (4.5–5.5) to maintain a good polish. It is also anisotropic and fairly dense (SG 5.9–6.1). Synthetic scheelite produced via the Czochralski process is available, but it has never been widely used as a diamond simulant. Due to the scarcity of natural gem-quality scheelite, synthetic scheelite is much more likely to simulate it than diamond. A similar case is the orthorhombic carbonate cerussite, which is so fragile (very brittle with four directions of good cleavage) and soft (hardness 3.5) that it is never seen set in jewelry, and only occasionally seen in gem collections because it is so difficult to cut. Cerussite gems have an adamantine luster, high RI (1.804–2.078), and high dispersion (0.051), making them attractive and valued collector's pieces. Aside from softness, they are easily distinguished by cerussite's high density (SG 6.51) and anisotropy with extreme birefringence (0.271)..
Desert Diamonds are also known as Saudi Diamonds, or sometimes Qaysumah Diamonds.
They are natural, semi-precious stones from the same micro-crystalline family as Amethyst, smoky Topaz and Citrine. These unique, high-grade stones have physical properties that produce the appearance of the expensive carbon-based diamonds! DESERT DIAMONDS are FOREVER, just like their carbon diamonds cousin. They are guaranteed not to discolor or break with age. This is the huge advantage of owning Dessert Diamonds vs. cubic zirconia. Compared with the carbon-based stones, which have a hardness factor of 10 on the Mohs scale, the Desert Diamond are only rated at a mere 7.0 on the Moh's Scale!.
Due to their rarity fancy-colored diamonds are also imitated, and zircon can serve this purpose too. Applying heat treatment to brown zircon can create several bright colors: these are most commonly sky-blue, golden yellow, and red.
Blue zircon is very popular, but it is not necessarily color stable; prolonged exposure to ultraviolet light (including the UV component in sunlight) tends to bleach the stone. Heat treatment also imparts greater brittleness to zircon and characteristic inclusions. Another fragile candidate mineral is Sphaerite (zinc blende). Gem-quality material is usually a strong yellow to honey brown, orange, red, or green; its very high RI (2.37) and dispersion (0.156) make for an extremely lustrous and fiery gem, and it is also isotropic. But here again, its low hardness (2.5–4) and perfect dodecahedral cleavage preclude sphalerite's wide use in jewelry.
Two calcium-rich members of the Garnet group fare much better: these are grossularite (usually brownish orange, rarely colorless, yellow, green, or pink) and andradite. The latter is the rarest and most costly of the Garnets, with three of its varieties—topazolite (yellow), melanite (black), and demantoid (green)—sometimes seen in jewelry.
Demantoid (literally "diamond-like") especially has been prized as a gemstone since its discovery in the Ural Mountains in 1868; it is a noted feature of antique Russian and Art Nouveau jewelry. Titanite or Sphene is also seen in antique jewelry; it is typically some shade of chartreuse and has a luster, RI (1.885–2.050), and dispersion (0.051) high enough to be mistaken for diamond, yet it is anisotropic (a high birefringence of 0.105–0.135) and soft (hardness 5.5). Discovered in the 1960s, the rich green tsavorite variety of grossular is also very popular. Both grossular and andradite are isotropic and have relatively high RIs (ca. 1.74 and 1.89, respectively) and high dispersions (0.027 and 0.057), with demantoid's exceeding diamond. However, both have a low hardness (6.5–7.5) and invariably possess inclusions atypical of diamond—the byssolite "horsetails" seen in demantoid are one striking example. Furthermore, most are very small, typically under 0.5 carats (100 mg) in weight. Their lusters range from vitreous to subadamantine, to almost metallic in the usually opaque melanite, which has been used to simulate black diamond. Some natural spinel is also a deep black and could serve this same purpose..
Because Strontium Titanate and glass are too soft to survive use as a ring stone,
they have been used in the construction of composite or doublet Diamond simulants. The two materials are used for the bottom portion (pavilion) of the stone, and in the case of strontium titanate, a much harder material—usually colorless synthetic Spinel or Sapphire—is used for the top half (crown). In glass doublets, the top portion is made of almandine Garnet; it is usually a very thin slice which does not modify the stone's overall body color. There have even been reports of diamond-on-diamond doublets, where a creative entrepreneur has used two small pieces of rough to create one larger stone. In Strontium Titanate and Diamond-based doublets, an epoxy is used to adhere the two halves together. The epoxy may fluoresce under UV light, and there may be residue on the stone's exterior. The garnet top of a glass doublet is physically fused to its base, but in it and the other doublet types there are usually flattened air bubbles seen at the junction of the two halves. A join line is also readily visible whose position is variable; it may be above or below the girdle, sometimes at an angle, but rarely along the girdle itself.
The most recent composite simulant involves combining a CZ core with an outer coating of laboratory created amorphous diamond. The concept effectively mimics the structure of a cultured pearl (which combines a core bead with an outer layer of pearl coating), only done for the diamond market..
So again, get to know your jeweler or gemologist and don't be fooled by unknown vendors, salespersons and especially eBay and other auction sellers without having a chance to check-out the item completly yourself, with return rights.
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Friday, January 27, 2012
BLUE AMBER - a Total Surprise !
Piece of Dominican Blue Amber as seen in the rough
Amber is supposed to be amber color, right? Not exactly. There is the original colors of Amber, yellow, orange, honey, cognac or similar. A new delight among jewelry designers is Butterscotch Amber, found in the Baltic as well as the Middle East. But there also is cream, cherry, red, green and even blue, which is by far the rarest of all the Ambers. Up to this day many people do not believe in the existence of "BLUE" amber. Must be something in the air or in the ground, since two of the more highly prised gemstones that come from the Dominican Republic are both "BLUE" - Blue Amber and Larimar.
Chunk of Dominican Amber with Reds-Cognac-Yellow coloring.
Is Blue Amber Truly Blue? No. It is not. And yet, it is. Confused? Blue Amber is a result of fluorescence and no solid color exists. Ultra-violet or violet light is re-emitted as blue or green light, attributed to the presence of poly-nuclear aromatic molecules. Therefore, Blue amber is blue, but not the way you might think.
When sunlight strikes the Blue Amber on a white surface the light particles pass right through and are refracted by the white surface. Result: the Blue amber looks almost like any other Amber, only with a light blue hue. But when the light particles can't pass through and refract back, the hydrocarbons in the Blue Amber turn the sun's ultraviolet light into blue light particles. The result: the famous blue glow of Blue Amber. This effect is only possible with Dominican Blue Amber pieces graded within the Blue Amber category. Any other Amber (like Baltic and others) will not display this blue phenomenon at all. And, on top of that other Dominican Amber will show this blue efraction only in concentrated UV light, and not in natural light. Light passed through the Blue Amber from a flashlight, will also result in the normal looking cognac amber color.
Example of same piece of Blue Amber with front lighting, then looking as same piece lighted from the reverse
Thanks to The Amber Ranch for the pieces of and the info on Dominican Blue Amber
Sunday, January 22, 2012
LARIMAR - Jewelry of the Caribbean !

Tuesday, December 6, 2011
Copper and Bronze Settings and Chains !
Japanese Fossil Chrysanthumum Stone
With the cost of Gold and Silver, that is especially 22k gold and Sterling Silver, skyrocketing to over $1700.00 an oz, with silver at $30.00 an oz, and maybe even higher by year end, we have decided to try, with some success so far, setting some of our handmade gemstone pendants into Copper and Bronze settings and making up matching chains to go with them.
Mexican Azurite Russian Black Jade
Monday, November 21, 2011
The Peddler's Show - Fredricksburg, Texas !
The shopping experience designed to be as individual and unique as you!

Tuesday, November 15, 2011
Freeman Coliseum Holiday Extravaganza !

Jewelry by CnC will be located in Booth O-4 on the Coliseum Main Floor.
The Holiday Extravaganza is open
Saturday Nov 19th 9 to 5
Sunday Nov 20th 10 to 5
Monday, November 14, 2011
Freeman Holiday Show Special Design !



Saturday, November 12, 2011
Freeman Holiday Show !
November 19th and 20th
Freeman Coliseum
Saturday 9am to 5pm
Sunday 10am to 5pm
Come and see new designs from
Jewelry by CnC
These bracelets are just some of the new and interesting items that can be seen during the show.
Friday, November 11, 2011
33rd Annual Christmas Showcase - Freeman Coliseum !
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This show comes just in time for those of you that are in the San Antonio area to join us for your Holiday shopping !!
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November 19th - 20th
-- Saturday: 9:00am-5:00pm
-- Sunday: 10:00am-5:00pm
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The Jewelry by CnC booth is on the floor of the main building, all the way through the show to the back, under the overhang, last booth on the right (O-04). .
Friday, November 4, 2011
COKERFEST - Holiday Craft Fair at Coker UMC !
Thursday, November 3, 2011
Holiday Sets at COKERFEST !

Monday, October 31, 2011
LLANITE - A Uniquely Texas Gemstone !
Finding unique gemstones is always a thrill. Being able to get hold of enough to be able to include in several jewelry pieces is extremely rare. Add to that the ability to get one of these rare, one location only gemstones from near ones home, makes for a real thrill in the making of jewelry.Llanite is a hypabyssally intruded Rhyolite with phenocrysts of microcline and euhedral Quartz. The quartz crystals are blue hexagonal bipyramids. The unusual blue coloration of the quartz is thought to be due to ilmenite inclusions. It is named after Llano County Texas, the only place where it is found. A dike of Llanite outcrops about 9 miles north of the town of Llano.
Many times during grinding and polishing, the Llanite looses it reddish color as seen in the picture of some slabs. Older material was much redder than that currently being found. Sometimes when finishing pieces, pendants will maintain some of the reddish color when held in a specific position in the light. Current diggings into the dike are producing a grayer material, but the blue Quartz flakes still appear.
A Llanite pendant and earring set with highlight Czech Crystals.
The following are some examples of pendants and earrings that have been cut and polished out of Llanite slabs.




























