-40%
250 Cts Raw Beryl Emerald Crystals from Rwanda 2-15 mm x 4-55 mm No.:101
250 Cts Raw Beryl Emerald Crystals from Rwanda 2-15 mm x 4-55 mm No.:101
250 Cts Raw Beryl Emerald Crystals from Rwanda 2-15 mm x 4-55 mm No.:101
250 Cts Raw Beryl Emerald Crystals from Rwanda 2-15 mm x 4-55 mm No.:101
250 Cts Raw Beryl Emerald Crystals from Rwanda 2-15 mm x 4-55 mm No.:101
250 Cts Raw Beryl Emerald Crystals from Rwanda 2-15 mm x 4-55 mm No.:101
250 Cts Raw Beryl Emerald Crystals from Rwanda 2-15 mm x 4-55 mm No.:101
250 Cts Raw Beryl Emerald Crystals from Rwanda 2-15 mm x 4-55 mm No.:101
250 Cts Raw Beryl Emerald Crystals from Rwanda 2-15 mm x 4-55 mm No.:101
250 Cts Raw Beryl Emerald Crystals from Rwanda 2-15 mm x 4-55 mm No.:101
250 Cts Raw Beryl Emerald Crystals from Rwanda 2-15 mm x 4-55 mm No.:101
250 Cts Raw Beryl Emerald Crystals from Rwanda 2-15 mm x 4-55 mm No.:101

250 Cts Raw Beryl Emerald Crystals from Rwanda 2-15 mm x 4-55 mm No.:101

$ 6.33

Availability: 74 in stock
  • Natural/Lab-Created: Natural
  • Restocking Fee: No
  • Total Carat Weight (TCW): 250 Carats or 50 Grams
  • All returns accepted: Returns Accepted
  • Item must be returned within: 30 Days
  • Refund will be given as: Money Back
  • Country/Region of Manufacture: Rwanda
  • Color: Green-Blue
  • Return shipping will be paid by: Seller
  • Condition: New without tags
  • Treatment: Not Enhanced
  • Shape: Stick Crystals

    Description

    250 CARATS/50 GRAMS ASSORTED SIZE RAW BERYL EMERALD CRYSYALS FROM RWANDA
    2-15 mm x 4-54 mm
    No.: 101
    You are buying ONE (1) Lot of 250 Carats or 50 Grams Raw Beryl Emerald Crystals from the Country of Rwanda. The Crystals have sizes ranging from 2 mm to 15 mm in diameter and are from 4 mm to 54 mm long. The mix is always random. They are in mint raw mined condition. They are made from Be
    3
    Al
    2
    Si
    6
    O
    18
    which of course is the mineral Beryl.
    This material has high hardness, high stiffness, good corrosion resistance to chemicals at high temperature, and high use temperature. They may be cut and polished. Some will yield gem quality Emeralds. They have a lovely Blue-Green Color.
    They may also be used for jewelry or for applications. Your imagination is the only limiting factor in the spectrum of possible applications for this component. Be sure to view all photos as they are an integral component of the item description.
    The specifications for these components are as follows:
    Outside Diameter:
    Approximately 2 mm - 15 m
    Length:
    Approximately 4 mm - 54 mm
    Please Note:
    There are visually discernible differences in any or all of the dimensions.
    Composition:
    Molecular Weight = 537.50 gm
    Beryllium
    5.03 % Be
    13.96 % BeO
    Aluminum
    10.04 % Al
    18.97 % Al
    2
    O
    3
    Silicon
    31.35 % Si
    67.07 % SiO
    2
    Oxygen
    53.58 % O
    ______
    ______
    100.00 %
    100.00 % = TOTAL OXIDE
    Empirical Formula:
    Be
    3
    Al
    2
    Si
    6
    O
    18
    Physical Properties of Beryl
    Cleavage:
    {0001} Imperfect
    Color:
    Green, Blue, Yellow, Colorless, Pink.
    Density:
    2.63 - 2.9, Average = 2.76 gr/cm
    3
    Diaphaneity:
    Transparent to subtranslucent
    Fracture:
    Brittle - Conchoidal - Very brittle fracture producing small,
    conchoidal fragments.
    Habit:
    Columnar - Forms columns
    Habit:
    Crystalline - Coarse - Occurs as well-formed coarse-sized
    crystals.
    Habit:
    Prismatic - Crystals Shaped like Slender Prisms (e.g.tourmaline).
    Hardness:
    7.5-8 Mohs
    Luminescence:
    Non-fluorescent.
    Luster:
    Vitreous - Resinous
    Streak:
    White
    Optical Properties of Beryl
    Dichroism (e):
    yellowish green, colorless, or colorless.
    Dichroism (w):
    bluish green, blue, or pink.
    Gladstone-Dale:
    CI meas= 0.008 (Superior) –
    where the CI = (1-KPDmeas/KC)
    CI calc = -0.039 (Excellent) - where the CI = (1-KPDcalc/KC)
    KPDcalc = 0.2205,KPDmeas= 0.2106,KC= 0.2123
    Ncalc = 1.56 - 1.62
    Optical Data:
    Uniaxial (-), e=1.564-1.595, w=1.568-1.602,
    Birefringence =0.0040-0.0070.
    These components were not specifically manufactured for an individual application; therefore be sure to check the dimensional descriptions carefully for your application. Future returns or requests for refunds, because of some "fit" issue or the like will not be honored.
    Your imagination is the only limiting factor in the spectrum of possible applications for these components and materials.
    If you require additional technical information, design, or application engineering consultation, feel free to contact us. As a materials scientist with four decades experience in high temperature processing, ceramics, dentistry, and jewelry manufacture it will be possible to provide you with creative and imaginative approaches to your requirements.
    Feel free to ask any questions you may have regarding this item early. Use PayPal only.
    Please complete payment transactions within 3 days. Items are generally shipped via USPS first class mail with delivery confirmation.
    Ask about shipping costs to your country.
    Feedback is provided for all buyers. We will appreciate yours as well.
    We strive to maintain excellent customer service; and are able to solve virtually any issues you may have. Every effort to provide the most accurate information about this item and every appropriate precaution in packaging this item is made, to assure that your highest expectations and satisfaction are met, and are exercised to meet this requirement for excellence. In winning this auction or purchasing this item you are agreeing that you will first provide the seller every opportunity to provide redress or resolution to any issues you many have concerning this item, prior to leaving any negative feedback about the seller or the item.
    No.:101