Jerry Ehrenwald

Former President, International Gemological Institute & Graduate Gemologist

Jerry Ehrenwald, GG, ASA, is a graduate gemologist in New York City. He is the previous President of the International Gemological Institute and the inventor of U.S.-patented Laserscribe℠, a means of laser inscribing onto a diamond a unique indicia, such as a DIN (Diamond Identification Number). He is a senior member of the American Society of Appraisers (ASA) and is a member of the Twenty-Four Karat Club of the City of New York, a social club limited to 200 of the most accomplished individuals in the jewelry business.

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Co-authored Articles (18)

How to

Tell if Gold Is Real

How do you tell if gold is real, gold plated, or fake? By most international standards, anything with less than 41.7% or 10 karats of gold is considered fake. To test your jewelry or gold at home, you can perform a few e...

How to

Tell if Jade Is Real

Jade is a beautiful stone that can be green, lavender, orange, red, yellow, or white. It’s quality is graded A, B, and C, depending on how it’s been treated. Whether you’re shopping for jade or are curious about yo...

How to

Find out How Much Something Is Worth

Have you ever wondered how much your antique artwork is worth, or what the value of your baseball card collection is? Whether you plan to sell an item, have it insured, or you’re simply curious, there are many ways to ...

How to

Tell if a Ruby is Real

Rubies can be the most valuable colored gemstone, based on price-per-carat. However, there are a lot of fakes out there, and it can be hard to tell if a ruby is real. Ultimately, the surest way to tell is to take the sto...

How to

Tell Gold from Brass

Gold and brass are both shiny, yellow metals. Telling them apart can be difficult for someone who has no experience with metals. Luckily, there are several ways to differentiate between gold and brass. If you know what t...

How to

Tell if a Cameo Is Authentic

The cameo is a very elegant piece of jewelry that has recently come back into fashion, but due to its popularity, there are more realistic imitations nowadays than ever before. It can be difficult to know when a cameo is...

How to

Test Gold with Vinegar

Gold is a very beautiful metal that can be found in jewelry, coins, watches and more. You may have just bought a new piece and want to see if it’s real, or test the genuineness of an old family heirloom. Testing gold w...

How to

Price a Gold Chain by the Gram

Astute shoppers of gold chains, such as figaro, curb, rope or other types of necklaces, know that the intrinsic value of the precious metals used determines its actual market value. Find out how to price gold chains fro...

How to

Clean Sterling Silver Jewelry

Sterling silver isn’t pure (pure silver is known as fine silver) but rather an alloy that contains about 10 percent of another metal, such as copper. Silver is actually a very soft metal, so it’s combined with other ...

How to

Clean White Gold

Gold that has been mixed with other alloy metals, like palladium and silver, is what constitutes white gold. It’s generally plated with rhodium, and it’s popular because it’s so shiny! It’s not difficult to care ...

How to

Repair Silver Jewelry

Silver jewelry is a great alternative to gold jewelry. It is cheaper, but still sturdy and visually appealing. But, silver jewelry needs care and keeping just like any other precious metal, and is just as likely to need ...

How to

Clean Cubic Zirconia

Although they are not real diamonds, cubic zirconia stones possess many of the same traits of more valuable gems. To preserve their shine and beauty, cubic zirconia gems should be cleaned monthly. Cleaning is a quick, si...

How to Care for Jade: Cleaning, Polishing, & Storage

Simple steps to keep your jade pristine & shiningJade is the common name for 2 brilliant green gems: jadeite and nephrite. Whether you have some dull jadeite jewelry or a nephrite crystal in your collection that lacks l...

How to

Polish Sterling Silver

Sterling silver is an alloy of the precious metal silver that is white in color and is highly reflective of light. Because silver in its purest form is too soft for use in everyday items, most silver used in jewelry, fla...

How to

Sell Diamonds

Selling your diamond jewelry is a good way to earn a little extra cash, but it can be a daunting process. If you want to get the best price for your diamonds, it is important to understand your options before selling. Yo...

How to

Fix Tarnished Silver

There are a variety of ways to clean tarnished silver. You can mix together a natural cleaning solution using vinegar, salt, and baking soda to submerge your silver. If you want to make things easy, specialized silver sp...

How to

Price Your Jewelry Designs

Pricing jewelry is one of the most important parts of jewelry making, because it will both speak to the quality of your product and determine whether your business can be profitable. There are many formulas for setting t...

How to

Clean Sterling Silver at Home

You can breathe new life into sterling silver by cleaning it at home. Instead of relying on commercial silver cleaners, try removing tarnish with a soft, nonabrasive cloth. For tough tarnish, try a mild dishwashing liqui...