Underwater Gems: Fascinating Facts About Pearls

Coolest news story of the month: a fisherman in the Philippines recently revealed that he had been keeping the world’s largest pearl under his bed for the past 10 years. The monster pearl is one foot long, over 2 feet wide, and weighs 75 pounds!

Photo courtesy of the fisherman's aunt, Aileen Cynthia Maggay-Amurao, via Facebook.

Photo courtesy of the fisherman’s aunt, Aileen Cynthia Maggay-Amurao, via Facebook.

Despite its gnarly appearance, the pearl has been declared to be worth over $100 million. The fisherman said he found the pearl in a giant clam while out fishing over a decade ago.

When we read this story here at Blue Door Beads, our first thought was “Holy moly! That thing is crazy huge!” The, our second thought was, “Huh…I thought only oysters produced pearls…?” And that got us thinking some more: what else don’t we know about pearls? Turns out, quite a bit. But now we’ve done some research and are ready to share some really interesting pearl facts with you!

Besides oysters, what other types of critters produce pearls?

Many salt- and freshwater mollusks, not just oysters, produce pearls. They may be formed in mussels, conchs, cowries, and scallops — to name a few — “and come in a rainbow of colors, depending on the species of mollusk.” (nationalgeographic.com) Although fairly rare, even giant clams have produced their fair share of pearls, including the Pearl of Lao Tzu and the as-yet-un-named pearl pictured above.

What exactly is a pearl?

It’s “an adaptation to get rid of a piece of schmutz,” explains Paula Mikkelsen, a biologist who studies mollusks at the Paleontological Research Institution in Ithaca, New York. “The mantle [the fleshy part of the shell] pulls calcium carbonate from the water and layers it around the intruding irritant” in an attempt to relieve the discomfort (nationalgeographic.com) The irritant is most frequently organic material, parasites, or even “damage that displaces mantle tissue to another part of the mollusk’s body.” These small particles or organisms can end up inside a mollusk when the shell valves “are open for feeding or respiration.” (www.wikiwand.com) In the photo below, you can see what a natural pearl looks like when cut in half:

Here is a cross-section through a drilled natural pearl (approx. 5 mm diameter.) The inner part is rich in organic material made of calcite prisms. The outer part shows fine concentric rings and is made of nacre. Photo courtesy of H.A. Hänni, SSEF and GemExpert, via missjoaquim.com

Here is a cross-section through a drilled natural pearl (approx. 5 mm diameter.) The inner part is organic material made of calcite prisms. The outer part shows fine concentric rings and is made of nacre. Photo courtesy of H.A. Hänni, SSEF and GemExpert, via missjoaquim.com

The layers of nacre wrapped around the nucleus resemble a jawbreaker cut if half — although it’s not nearly as tasty-looking! Most pearls are a made of a combination of calcium carbonate, aragonite, calcite, and an “organic horn-like compound called conchiolin.” (www.wikiwand.com)

The reason why you don’t find a pearl in every wild mollusk is because, for the most part, mollusks are able to open their shells to expel any irritants. Scallops can even open their shells rapidly enough that they can travel quickly by “clapping.” (Here is an amusing short video!) This is why pearls used in the jewelry industry typically come from mollusk farms, where the critters can not only have uniformly-shaped “irritants” inserted into their shells — resulting in more uniformly-shaped pearls — but they can also be kept stationary (i.e. have their shells kept closed) by having nets placed over them.

Below is a diagram of the difference between a cross-section of a non-natural pearl that had an already-large round bead inserted inside it (usually made from a polished sphere made from a freshwater mussel shell), and a cross-section of a natural pearl that built its size up over time with many layers of nacre (pronounced NAY-kur):

Photo courtesy of wikiwand.com

Photo courtesy of wikiwand.com

So, while we’re on the subject…

What’s the difference between cultured pearls & natural pearls?

Turns out, in the modern-day jewelry and bead industry, almost all pearls are cultured pearls. This means they were created through human intervention of some kind, not created on their own out in the wild. Cultured pearls are supervised throughout their development; those supervising must ensure that the mollusk receives the food it requires and the surrounding water temperature remains consistent and pollutant-free. Consistency in these areas means pearls can be grown to be the same color, size, and shape. Cultured pearls can be either saltwater pearls or freshwater pearls.

To break it down, there are three types of saltwater cultured pearls, most of which can only be nucleated with one pearl at a time:

1. South Sea Pearls

Photo courtesy of americanpearl.com

Photo courtesy of americanpearl.com

South Sea pearls come in two colors: white and black. The white pearls are primarily cultured in the waters of northern Australia, the Philippines, and Indonesia and can vary from white, to light yellow, to gold (usually from the Philippine and Indonesian waters) from white-to-silver (usually from the Australian waters.) The black pearls are found “over a wide area from the Cook Islands to the Gambier Islands in French Polynesia.” (www.missjoaquim.com)

2. Tahitian Pearls

Photo courtesy of pearlsofjoy.com

Photo courtesy of pearlsofjoy.com

These are considered some of the most beautiful pearls in the world, ranging in color from charcoal gray to dark green and black. Tahitian pearls are only produced by the black-lipped oyster, which is only found around Tahiti and the French Polynesian Islands. The oyster itself is quite large, as much as 12 inches across and up to 10 pounds, which results in larger-than-average pearls. (www.missjoaquim.com)

3. Akoya Pearls

Here is a quality chart for saltwater Japanese akoya cultured pearls. As you can see, the brighter the luster, the higher the grade of pearl. Chart photo courtesy of americanpearl.com

Here is a quality chart for saltwater Japanese Akoya cultured pearls. As you can see, the brighter the luster, the higher the grade of pearl, AAA being the most valuable. Chart photo courtesy of americanpearl.com

Considered to be the classic cultured pearl type, Akoya pearls are cultured in south-western Japan and China. Akoya pearls typically range from soft pink to “creamy silver” colors. “The Akoya breed of oyster is the smallest pearl-producing oyster used in pearl culturing. The resulting pearls also tend to be smaller, ranging in size from 2mm to 11mm and are consistently round or nearly round,” making them highly coveted in the jewelry industry.

The term freshwater pearl refers to a wide range of different shapes of pearls (such as potato-shaped, rice-shaped, coin-shaped, and many more), but can be summed up with one main definition: freshwater pearls are cultivated in mussels that live in fresh water lakes and rivers rather than oysters that live in oceans. The nacre of high-quality freshwater pearls does not typically have the glossy finish of Akoya pearls, “and they are evaluated on separate quality scales” than the chart pictured above (www.pearlparadise.com). Quite frequently, freshwater pearls are funkier in shape because, instead of inserting a perfectly round bead into the mussel, cultivators often add “a tiny piece of mantle tissue from a donor shell”; since the mussel is adding nacre to a non-solid item, the result is an irregular pearl. (www.wikiwand.com)

Which pearl colors are natural, and which are enhanced?

Pearls can commonly be found in a wide range of natural colors, including white, pink, silver, cream/ivory, and yellow. Pearls in darker colors (such as light brown, chocolate brown, green, blue, black, and purple) can also be found naturally, although they are much more rare. If you come across pearls that are in this darker color family and are inexpensive (i.e. less than a few hundred dollars), chances are the pearls have been enhanced with a bleaching-then-dyeing process. Check out the pictures below to see the wide variety of both traditional and non-traditional pearls that can be found in a variety of mollusks from around the world!

We hope you have enjoyed learning more about one of nature’s most interesting creations, and we also hope that the next time you come across pearls of any kind, you’ll think of the fascinating circumstances that helped make them possible!

All photos below (and info in captions, unless other wise noted) are courtesy of thepearlcollector.com, where you can find out more about other amazing pearls, such as scallop pearls, abalone pearls, and more!

One of the rarest natural pearls in the world, conch pearls are typically only found in 1 of every 10,000 conch shells. Very few of these pearls possess the brilliant, bright pink or red color that is so highly coveted; most range in color white, to beige, brown, yellow, or orange. The equally rare flame pattern is also a highly desired featured of conch pearls.

One of the rarest natural pearls in the world, conch pearls are typically only found in 1 of every 10,000 conch shells. Very few of these pearls possess the brilliant, bright pink or red color that is so highly coveted; most range in color from white, to beige, brown, yellow, or orange.

Melo pearls come from the Indian Volute (a.k.a. Melo Melo), which is a giant sea snail found in the waters of Vietnam, Burma, and Malaysia. Melo pearls are not only typically very large (400+ carats), but also range in color from papaya orange to shades of yellow, beige, brown, and white.

Melo pearls come from the Indian Volute (a.k.a. Melo Melo), which is a giant sea snail found in the waters of Vietnam, Burma, and Malaysia. Melo pearls are not only typically very large (400+ carats), but also range in color from papaya orange to shades of yellow, beige, brown, and white.

Clam pearls, like conch pearls, are also coveted to their flame patterns. Like Melo pearls, they are often quite large -- the bigger, the better!

Clam pearls, like conch pearls, are also coveted to their flame patterns. Like Melo pearls, they are often quite large — the bigger, the better!

Quahog clams are extremely common, and can be found from as far north as New Brunswick, Canada and as far south as the Gulf of Mexico. However, their pearls are very rare, and the very valuable lavendar pearls even more so! Check out this fun story about a cop from MA who found one of these treasures in his clam chowder!

Quahog clams are extremely common, and can be found from as far north as New Brunswick, Canada and as far south as the Gulf of Mexico. However, their pearls are very rare, and the very valuable lavendar hue even more so! Check out this fun story about a cop from MA who found one of these treasures in his clam chowder!

This is a priceless collection of rare natural pearls that is kept by the Qatar Museums Authority Collection; the Arabian Gulf was a key supplier of natural pearls by the 19th century. (Photo and info courtesy of theguardian.com)

This is a collection of rare natural pearls that is kept by the Qatar Museums Authority Collection; the Arabian Gulf was a key supplier of natural pearls by the 19th century. (Photo and info courtesy of theguardian.com)

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New Year’s Resolution: Get Your Craft On!

The hectic holiday season is over, things in the shop are a little less crazy, and we finally have time to sit down and make some jewelry! We have many goals for 2015, including exploring more jewelry-making topics and mastering more jewelry-making techniques, but we definitely wanted to start the year off right by jumping right in and getting our craft on!

We found many, MANY lovely and inspiring photos of pieces we wanted to make on Pinterest, and we got busy putting our own spin on the unique — yet easy-to-do –designs. Below are just a few of our recent creations, and we hope they inspire you to be ambitious and get YOUR craft on in 2015!

Earring design  and photo courtesyt of Judie Mountain.

Earring design and photo courtesyt of Judie Mountain.

Earrings created by Lydia Chapman. Photo courtesy of rerephoto.com.

Earrings created by Lydia Chapman. Photo courtesy of rerephoto.com.

Quartz & brass necklace designed by MoonshineDivineCo on Etsy.

Quartz & brass necklace designed by MoonshineDivineCo on Etsy.

Necklace created by Lydia Chapman. Photo courtesy of rerephoto.com.

Necklace created by Lydia Chapman. Photo courtesy of rerephoto.com.

Hammered copper disc earrings design by AllowingArtDesigns on Etsy.

Hammered copper disc earrings design by AllowingArtDesigns on Etsy.

Earrings created by Lydia Chapman. Photo courtesy of rerephoto.com.

Earrings created by Lydia Chapman. Photo courtesy of rerephoto.com.

Earrings created by Lydia Chapman. Photo courtesy of rerephoto.com.

Earrings created by Lydia Chapman. Photo courtesy of rerephoto.com.

Hammered copper earrings by JudysDesigns on Etsy.

Hammered copper earrings by JudysDesigns on Etsy.

Copper earrings created by Briana Oliver. Photo courtesy of rerephoto.com.

Copper earrings created by Briana Oliver. Photo courtesy of rerephoto.com.

(K)NOT Your Average Jewelry

The technique of knotting between beads (most often pearls) has been used practically since the dawn of jewelry-making; not only does it provide attractive spacing and prevent beads from rubbing up against one another, but it also prevents more than one bead from getting lost if/when the jewelry pieces breaks. We love adding knots to the jewelry we create here at Blue Door Beads, and we are always intrigued by the incredibly unique (and often amazingly complex) jewelry designs people can come up with by using just a few well-placed knots! We teach a knotting class here at the shop in which students learn to create not only decorative knots, but functional knots as well. The possibilities are endless when it comes to knotting, and we wanted to share a few of our favorite knot-based designs with you. Enjoy!

We love the simplicity of these knotted bracelets! Photo courtesy of The Bead Gallery in Honolulu. Photo courtesy of The Bead Gallery in Honolulu.

We love the simplicity of these knotted bracelets! Photo courtesy of The Bead Gallery in Honolulu. Photo courtesy of The Bead Gallery in Honolulu.

This lovely gemstone necklace was knotted in a traditional style, with knots between every bead. Photo courtesy of www.sundancecatalog.com

This lovely gemstone necklace was knotted in a traditional style, with knots between every bead. Photo courtesy of http://www.sundancecatalog.com

A close-up of the Sundance gemstone necklace.

A close-up of the Sundance Catalog gemstone necklace.

This incredible micro-macrame bracelet includes prehenite and rhodochrosite accents. Photo courtesy of www.andtoad.com

This incredible micro-macrame bracelet includes prehenite and rhodochrosite accents. Photo courtesy of http://www.andtoad.com

We are always in awe of folks who create intricate, lace-like micro-macrame designs like these. Gorgeous! Photo courtesy of www.thebeadingyogini.com

We are always in awe of folks who create intricate, lace-like micro-macrame designs like these. Gorgeous! Photo courtesy of http://www.thebeadingyogini.com

Amazing earrings! Photo courtesy of www.micro-macramejewelry.com

Amazing earrings! Photo courtesy of http://www.micro-macramejewelry.com

We were obsessed with hemp jewelry in junior high, so we always enjoy a jewelry flashback! Photo courtesy of JackZenHe,mp on Etsy.

We were obsessed with making hemp jewelry in junior high, so we always enjoy a jewelry flashback! Photo courtesy of JackZenHemp on Etsy.

We love the combination of woven beads and macrame knots in this bracelet. Photo courtesy of www.knotgypsy.blogspot.com.

We found the combination of woven beads and macrame knots in this bracelet very intriguing! Photo courtesy of http://www.knotgypsy.blogspot.com.

In the case of this statement necklace, the bigger the knot, the better! Photo courtesy of ElfinaDesign on Etsy.

In the case of this statement necklace, the bigger the knot, the better! Photo courtesy of ElfinaDesign on Etsy.

Soooo many bracelets! Photo courtesy of www.peacefulpeople.com

Soooo many cool knotted & woven bracelets! Photo courtesy of http://www.peacefulpeople.com

If you get too tangled up in your cord, take a cue from this little guy & take a nap!

If you get tangled up in your cord while knotting, take a cue from this little guy & take a nap!