Continuing Education about Diamonds

As a professional gemologist, it is my duty to periodically brush up on my educational requirements regarding the items I sell.  Since our expertise here at the Sydney Rosen Company is primarily Diamonds, and April is the month of the Diamond, I felt it would be fun to go over some of the fundamentals with you all.

I'll start off with a diagram of the "modern" cut diamond.

There are 4 main parts of a full cut diamond.  The Crown, Pavilion, Girdle, and

.  The Crown is the top-half of the diamond from the Girdle to the Table.  The Pavilion is the bottom half of the diamond from the Girdle to the Culet.  The Girdle is the middle portion, which can range in thickness from thin to extremely thin, to thick to extremely thick, depending on how the diamond was cut.  The Culet is the point at the bottom of the diamond.  Older cut diamonds may have a large polished facet as a Culet instead of a point.  A fifth important part of a diamond is the Table, which is the large octagon shaped facet at the top of the stone.

Next I will briefly go over the 4 C's of Diamonds, which are Cut, Color, Clarity and Carat Weight.

Cut:

A diamonds cut is determined as the combination of its relative proportions and how well they maximize the diamonds brilliance or light return.  Diamonds cut like the diagrams below will not display the proper amount sparkle.

The proper proportions and angles to create the most brilliant diamond are shown below:

In general, a diamonds brilliance is a factor of the Total Depth Percentage of a diamonds as compared to it's diameter, and the Diameter of the TABLE facet as compared to the Girdle Diameter which is shown below.

If the table size, and the total depth percentage fall within a desired range, the diamonds is said to be well cut.  The GIA goes further to give cut "grades" that range from Excellent, to Poor.  This cut grade system also takes into account Polish and  Symmetry, which are functions of how perfectly the rest of the diamond was finished.

Obviously, with the vast array of different diamond shapes, the desirable ranges for the table size and depth will vary from shape to shape.

Color:

Color is a much simpler metric.  It is the degree to which a diamond shows "color".  Diamonds are "Colorless" gems, however the vast majority are not perfectly white.  Most show some degree of yellow or sometimes brown.  The GIA developed a system that rates a diamonds color from D-Z.  D being the whitest, and Z the yellowest.  A Diamond's color is permanent, it is a function of trace elements that formed in the diamond as it was growing.  However, diamond can treated to improve it's Color.

Clarity:

Clarity is a measure of how free of inclusions or imperfection a diamond is.  Diamond is a mineral after all, and not all crystals will be perfect.  Most diamonds have blemishes and imperfections, however, if they cannot be seen to the naked to eye, they usually do not affect the overall beauty of the stone.

Carat Weight:

Carat weight is simple.  It is how much a diamond weighs on a gemological carat scale.  Carat weight and Cut have an interesting relationship, since how well a diamond is cut will determine how large it looks in comparison to it's true weight.

I hope this was a helpful reminder about the 4 C's.  There are more diagrams and more in depth lessons on our website.

Visit www.sydneyrosen.com to learn more!

All About Aqua

The birthstone for the month of March is AQUAMARINE.  Aqua is a light toned blue to greenish blue gemstone that is found in many locations all over the world.  The word Aquamarine comes from the latin for "seawater".

Aquamarine is in the Beryl family which also includes Emerald and Morganite.  While Emerald is generally known to have eye visible inclusions, Aquamarine is prized for its purity.  

Aquamarine is found on almost every continent in the world.  However, areas that are most famous for the gem are Brazil, Mozambique and Madagascar.  Aquamarine is often confused with another birthstone Blue Topaz, however, Topaz is typically a darker more saturated blue.  Since fine color Topaz is a much more abundant in the marketplace (and less expensive) than fine Aquamarine, it is often used as a suitable alternative for those shopping for a light blue gem.

A few years ago in 2012, the Smithsonian displayed the "Dom Pedro" Aquamarine, which is the world's largest cut Aqua, next to the infamous hope diamond.  This obelisk shape gemstone weighs over 10,000 carats, making it one of the largest gemstones of any variety ever cut.

Keep following the blog for more posts, and as always visit us online at www.sydneyrosen.com !

2014 Academy Awards Best Jewelry

The 2014 Oscar's were last night, and your favorite celebrities did not disappoint in their selections of the worlds finest jewelry to wear on the red carpet.  Here is a recap of some of the most dazzling looks from last nights broadcast....

Charlize Theron in GORGEOUS Harry Winston Cluster necklace and classic diamond studs.

Best Actress winner Cate Blanchett's Opal and Diamond earrings from Chopard.



America's sweetheart Sandra Bullock wore Lorraine Schwartz vintage style diamond ear clips.



Naomi Watts and Jennifer Biel followed the trend of night by wearing short diamond chokers.



America's OTHER sweetheart wore (yet again) a diamond necklace draped down her back...



And of course, who could have missed Angelina Jolie's knockout 42 CARAT flawless diamond earrings...


Sadly, we will have to wait until the Emmy's at the end of the summer to gawk at more of hollywoods most beautiful leading ladies jewelry...but i'm sure i'll find something else to before then to grab your attention.

Visit us at www.sydneyrosen.com to shop for your very own custom made jewelry.

AGTA GemFair

Perhaps the largest and most colorful gathering of jewels and jewelers in the world occurs every year at the American Gem Trade Association's GemFair in Tucson, Arizona.

Every year tens of thousands of attendees travel across the globe to buy and sell precious gemstones in every hue, tone and saturation.  It is, in fact, the largest trade show in the world specializing in semi-precious stones.



Rarer gemstones such as Black Opal from Australia, fine Aquamarine and Tourmaline from Brazil, and the highest quality pearls and jade from Asia are among the most coveted items up for sale.  However, gemstones are not the only draw.  This year, for example, new CAD design and 3-D printing technologies are on display.

This year, buyers are actually able to purchase a fine gem, create a custom CAD design for the gem, and have a 3-D model of the design printed for them to take home ALL IN THE SAME DAY!

In this way, the AGTA Tucson show is not only a great resource to buy/sell gemstones, but an opportunity to try out the latest and greatest in design technology and see if it makes sense for your business!

Our website does not exactly offer the level of custom design that is available at GemFair, however you CAN build your own custom engagement ring and have it shipped directly to your house.  Try it here!

Design Your Own Engagement Ring

and as always...visit us at our homepage to learn about our nearly 70 year history!

www.sydneyrosen.com

All About Amethyst

Amethyst is the birthstone for the month of February.  It is one of the most recognizable gemstones due to it's unique purple color and its relative abundance in nature.  Amethyst is actually just the name for the purple variety of Quartz, which is the second most abundant mineral in the earth's crust.

 Amethyst's typical hue ranges from a light pinkish violet to the vivid purple most people associate with the gem.  However, Amethyst is commonly color "zoned" so several different tones/saturation of violet and purple may appear in a single crystal.  Gemstone cutters are trained to cut rough amethyst crystal in a such a way that the finished gemstone looks consistent in color.  In rare occasions, the hue of a quartz crystal can change completely from one end of the crystal to the next, resulting in bi-color gems such as Ametrine a combination of the quartz varietals Amethyst and Citrine. (Pictured Below)

Amethyst has been worn as a gemstone for thousands of years.  The word amethyst actually comes from the Greek for "not intoxicated" as they believed that the stone prevented drunkenness.  Drinking vessels were often carved out of Amethyst in hopes that it would prevent them from becoming drunk.  There is also documented evidence of Egyptian's carving intaglios out of Amethyst crystals, and medieval soldiers wearing carved Amethyst amulets due to the belief that they had healing powers.  

Most of the Amethyst mined for jewelry in today's marketplace is located in the Minas Gerais region of Brazil, which is famous for it's large stock of a variety of different precious and semi-precious gemstones.  Other locales that produce a large amount of Amethyst crystals include Uruguay, Russia, Zambia, South Korea and the United States.  Below is a picture of an Amethyst boulder before and after it is cracked open. 

While not a terribly valuable gemstone due to it's abundance in nature, Amethyst is still coveted all over the world for its gorgeous purple color and it's cultural significance as the traditional birthstone for the month of February.  It can occur in very large sizes so it is popular as a gemstone for cocktail rings and large pendants as well as mother's rings and fashion jewelry.  

Visit us online at www.sydneyrosen.com to view our large selection of settings.  All of which can be customized to accommodate an Amethyst.  

Grammy Awards 2014 Jewelry

As far as awards season goes, the Grammy's IS usually the red carpet event in which celebrities tend to take the most risks.  Music is, after all, a vehicle for self expression and this year's awards were no exception.

Sparkle seemed to be the theme of the night, as music's biggest names adorned themselves not just in metallic prints and sequins (Taylor Swift practically wore chain mail), but in dazzling statement jewelry as well. From cocktail rings on practically every finger, to huge dangly earrings, the stars were not afraid to show off this.

Here's a brief recap of some of my favorite pieces seen on the red carpet Sunday night:

Taylor Swift's classic elegance in these emerald cut diamond dangle earrings.

Katy Perry's suite of ruby-colored jewels including these edwardian style earrings and cocktail rings.

Miranda Lambert's OPULENT Opal earrings with Amethyst cabochons...HOLY COW!

Pink's gorgeous Pear shape earrings and suite of matching bracelet and rings

And refusing  to be outdone....I give you....Beyonce's 10 Million worth of diamond rings and earrings

Not too shabby if you ask me!

Keep following the blog the next couple months to see what your favorite celebs wear to the Oscars and Emmy's!

And as always visit us online at www.sydneyrosen.com

2014 Golden Globes Jewelry Wrap Up

This years awards season started off with a bang thanks to a slew of A-List actors grabbing industry honors for their performances in 2013's biggest television and box office hits.  Stars like Jennifer Lawrence, Leonardo Dicaprio, Michael Douglas, Jared Leto and Amy Adams took home some of the more prestigious awards of the evening.

But as you know we like to focus on the ladies and their jewelry here!  

Minimalism and Art Deco designs seemed to be the trend this year. While Yellow Gold reaffirmed its status as a returning trend.

Here are just some of our favorite looks of the evening:

12 Years As A Slave actress Lupita Nyong'o's short hairdo made her classic diamond studs shine.

While Best Actress in a Comedy for TV winner Amy Poehler wore classic yellow gold cuffs from Jacob and Co.

And American Horror Story star Emma Roberts channeled 20's opulence in these gorgeous turquoise chandeliers danglers

Cate Blanchet and Jennifer Lawrence also got high marks for their Deco inspired earrings (Jennifer's earrings are Neil Lane)....

 


Overall everyone look fabulous as always and got me excited for the Emmys and Oscars when these stars REALLY dress up and take risks.  No offense Golden Globes...

Visit us online at www.sydneyrosen.com to shop for diamonds studs and other fine jewelry like this!