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Precious Metals Prices



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Pinnacle Supplies CO. Professional jewelers tools, magnifiers, polishing compound, polishing cloths and leather care products since 1981

Professional Instruments & Polishing Compounds

Diamond / Gem Reference Guide

F = Flawless. The diamond shows no inclusions or blemishes of any sort under 10X magnification when observed by an experienced grader. Note: Truly flawless or internally flawless (F or IF on the GIA's grading scale) diamonds are extremely rare.

IF = Internally Flawless. Diamond has no inclusions when examined by an experienced grader using 10X magnification, but will have some minor blemishes.

VVS1, VVS2 = Very, Very slightly included. Diamond contains minute inclusions that are difficult even for experienced graders to see under 10X magnification.

VS1, VS2 = Very slightly included. Diamond contains minute inclusions such as small crystals, clouds or feathers when observed with effort under 10X magnification.

SI1, SI2 = Slightly included. Diamond contains inclusions (clouds, included crystals, knots, cavities, and feathers) that are noticeable to an experienced grader under 10X magnification.

I1, I2, I3 = Included. Diamond contains inclusions (possibly large feathers or large included crystals) that are obvious under 10X magnification and may affect transparency and brilliance.

The term carat (ct) is a measurement of weight, not size. There are five carats to a gram. A 1 ct sapphire is smaller in size than a 1 ct diamond because it is heavier. There are 100 points to a carat, so a 50 point diamond weighs 1/2 of a carat or 0.50 ct.

The term spread refers to the size a diamond appears to be, based on its diameter. So a 0.90 ct stone with less depth might look the same size as a perfectly cut 1.00 CT diamond, but has less brilliance because it is cut shallow.

Wide selection of useful & unusual tools & products
Professional Jewelers Tools & Magnifiers
Tools Of The TradeQuality Magnifiers For Any Project
Quality Tools & Magnifiers For Any Project!
Click on the pictures or links above to check out our collection of essential precision jewelers & hobby tools including pro magnifiers & loupes, pliers, micro screwdrivers, calipers, rulers.
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Fast shipping! Orders processed & sent out usually within 48 hours
Metallux Fine Jewelry & Antiques Polishing Formula
Polish & Restore Platinum,Gold,Silver
A professional polish designed to gently remove unwanted patina & tarnish while removing the most minimal amount of metal. This restoration polish will impart a beautiful mirror shine & is ideal for delicate items & soft metals like gold, platinum, silver & antiques.
Museum Quality Restoration Polish For Use On Your Finest Antiques
Birthstone Information
Month Stone Color Hardness
January Mozambique Garnet
Rhodolite Garnet
Tsavorite Garnet
Reddish - Brown.
Deep Pink.
7 - 7.5
February Amethyst Medium - Dark Purple 7
March Aquamarine Pale Blue 7.5 - 8
April Diamond Clear White 10
May Emerald Green 7.5 - 8
June Pearl
White, Yellow or Pink.
Color changes from purple to green.
July Ruby Medium - Dark Red 9
August Peridot Olive Green 6.5 - 7
September Sapphire Medium - Dark Blue 9
October Pink Tourmaline
Medium - Dark Pink.
White with color streaks.

5 - 6.5

November Imperial Topaz
Yellow to Peach.
December Blue Zircon Medium Blue 6 - 6.5

Pinnacle Supplies CO. P.O. Box 700583 Miami, FL 33170-0583

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Featured Products

Finest quality optical polishing,cleaning cloth available
Pro Polishing Cloths
Crab style watch back case opener
Watch Case Openers
Watch Band Link Remover With 100% Metal Construction
Band Link Remover
Pro jeweler's spring bar tool
Spring Bar Remover
Watch case opener / battery replacement kit
Watch Tool Kit
100 Piece Delux Rotary Polishing Tool Set
100-PC Rotary Kit
30x power optical magnifying lens
Jeweler's Loupe
Pro Jeweler's Ring Sizing  Mandrel / Measuring Kit
Ring Expanding Kit
Precious metal weight conversion chart
Weight Conversion Chart for Gold, Silver and Gems.