NEW Chelsea Filter Dichroscope Refractometer Loupe

This kit, if used properly will allow you to identify about 85% of all precious gemstones, using three simple tools - Chelsea Filter, Dichroscope and Jewelers Loupe and to learn a lot about gemstones from hardcover Gemstones of the World book by Walter Schumann, highly rated by readers and experts.

This kit includes the following items:

Chelsea Filter

Of the many tools introduced to jewelers in the past few decades, the Chelsea filter has become one of the most popular. Originally used to differentiate genuine emeralds from other similarly colored stones such as tourmaline and peridot, the Chelsea filter is now used, often in conjunction with other tools such as the loupe or dichroscope to be able to identify mostly any gemstone. Since technology for creating synthetic gemstones has vastly improved in recent times, checking stones with the Chelsea filter alone is n longer considered sufficient.

Dichroscope

The dichroscope is another popular tool, which, like the Chelsea filter, is considered invaluable for distinguishing certain stones from similar gems. It can only be used on stones that are transparent, and are able to transmit light. It is used to differentiate between and identify stones of the similar colors. When looking through the dichroscope, the user should see two squares/rectangles, side by side. When viewing a stone, the user will see that it is either a single or a double refracting stone. What this means is that if the same color and the same shade is visible in both squares/rectangles, then the stone is single refracting. If the two boxes have varying colors/shades, then the stone is a double refracting stone, or a dichroic stone.. Sometimes, depending on the angle/direction of the light, a stone may have three colors, meaning when a pair of colors is seen through the dichroscope, and the direction at which the stone is being viewed changes, one of the original colors is replaced with a new color, resulting in a total of three colors; this is called a trichroic stone.

10x triplet jewelers loupe in black housing

Used to detect chips, cracks, scratches, sharpness of edges, symmetry in cutting, presence and types of flaws. It is essential to have 10 power (10 times magnification) triplet-type loupe in black housing.

Gemological refractometer is considered by many to be the most important of all gem testing instruments.

The primary use of the refractometer is to measure the angle at which light travelling through the stone is bent or refracted. This is called Refractive Index (R.I.). As Refractive Index is usually different for different gemstones, this provides an important clue for accurate gemstone identification.

Gemmological refractometer also can be used to determine whether or not a stone is single or double refracting.
For doubly refracting stone, based on the difference between 2 readings you obtain from the refractometer, strength of the gemstone's double refraction (birefringence) may be computed and it offers an important gem identification aid, as it differs from gem to gem.

Also refractometer is one of the few instruments capable to give you information for opaque stones as well as transparent stones.

Quality of the instrument is important to enable you to perform consistent and reliable test for years to come.

Our refractometer has all metal construction with built-in light (no flashligh or any other lightsource required) and polirizing filter, allowing you to perform all needed tests, it comes with vinyl soft case with belt loop for convenience while traveling and hard case for safe storage.

FEATURES:

• All metal quality construction
• Built-in LED light source with 3 x 1.5v batteries - included
• Accuracy: 0.01
• Measurement range: 1.30 - 1.81
• Polarizing Filter
• Weight: 0.9 lb (Shipping weight - 2.0 lbs)
• Application: Gemology
• Hard and soft cases are included
• GemPro (R.I.) 1.80 Certified Refractive Index Liquid. Contains 10 grams.

Instructions on how to use 3 simple tools to identify gemstones

We provide instructions on how to use all tools in the kit to identify gemstones

BONUS ITEM - GEMSTONES OF THE WORLD book by walter schumann

• Hardcover, Newly Revised and Expanded 3rd Edition
• Highly rated by experts and readers
• Precious and semi-precious stones described
• 1,500 photos of gems in rough and polished states
• Complete Physical Properties and Characteristics of the Stones
• Finding, Mining and Cutting of Gemstones
• Printed in Germany

• we promise to ship your order same or next business day in most cases
• most items are shipped by UPS ground or USPS Priority mail standard
• we promise to contact you immediately, if for any reason your order cannot be shipped to you in timely manner
• we promise to pack your items right, to minimize the possibility of your item(s) damage
• we promise to answer most questions and e-mails in 24 hours or less
• we promise to make your buying experience with us as pleasant and smooth as possible
• we promise always to be courteous, considerate and honest
• we promise, that products we sell are brand new and factory fresh
• we promise, that items we sell are of high quality, we select them carefully
• we are an authorized dealer for all products we sell - manufacturer's warranty will be honored by the manufacturer
• in rare cases we sell items, which are not new, not under warranty or have flaws or defects - items will be clearly marked as such

Currently we offer the following standard shipping methods on eBay:

Domestic(United States):

International:

Some of our items may be offered with shipping methods different from listed above. Individual listing conditions override the general rules.
Please note, that if FREE SHIPPING was offered with your item and you returned your item, actual shipping will be deducted from any refunds (except cases, when wrong item was shipped at our fault).

Please ask all questions on shipping before purchasing your item. Other shipping methods may be available at your request.
Items with value less than $50.00 may be shipped with USPS International Priority.

• Please refer to our Q&A page or our policies page if you have any questions.
• Our customer service available by email 24/7. Please send your questions and comments to info@igem.com.