vCalc

• Free online calculators since 2012
• vCalc = Wikipedia of Calculators

vCalc Token Types (16k+ Calculator and Data Pages)

1. Tags: Gambrel Roof, WTI, Jewelers
2. Equations: Cylinder Weight, Canadian Dollars per Liter to US Dollars per Gallon, Tree Basal Area per Acre
3. Data Items: 
   • constants Astronomical Unit  
   • dynamic Gold to Bitcoin Ratio
4. Calculators / Collections: Pole Barn Calc, Purchasing Calculator
5. Datasets: 4x8 Plywood and OSB Price Survey (manual, bulk upload, and data feeds)
6. WikiClips: Personal Finance Calculator List, Spot Price List

Specific Capabilities of note:

1. Units (over 500 units in 60 categories)
   • Weight/Mass Examples: carat, pennyweight, grams, troy ounces
2. Multi-language Support (Rebar Calc)
3. Sharing Results
4. QR Code Links

Diamond-Gem Demo

Notable Coin Content at vCalc.com

• Diamond Carat Weight Calculator: Twelve (12) functions to estimate the carat weight of a diamond based on the cut and diamond's dimensions.
• Gemstone Carat Weight Calculator: Twelve (12) functions to estimate the carat weight of a gemstone based on the type of gem, cut and stone's dimensions.
• Jewelers Calculator: Thirty two (32) functions to estimate the carat weight of gems and the current value of precious metals including alloys of different purity.
• Precious Metals Calculator: Eight (8) functions to compute the current market value of bullion and alloys of gold, platinum, palladium and silver based on the purity and current spot price. 
• R Bruce Carson Jewelers: 132 functions and data pages related to diamonds, gems and precious metals.

Introducing

• Gemological Institute of America Calculator

Jewelry

The following calculator and data pages are included in any PBV site with the tag Jewelry.  Tag pages contain lists of vCalc items that have that tag, Jewelry in this case, and they provide information associated with the concept.  Calculators and collections are bundled functions and data that appear on one page for convenience of the end users. Equations are single function calculator pages.  Data items are either static (e.g., constants) or variable (e.g., current pricing) data items useful in equations. Datasets are tables of information. WikiClips are web content snips that are useful for recurring content such as descriptions, lists of functions or images.  These can be imbedded in any other token and allow for easy maintenance and distribution of updated information.

Tag Pages (4)

• Tag Page: Jewelry, Jewelers, Gemstones, Diamond
• Parent Categories: 

Calculators and Collections (4)

1. Diamond Carat Weight Calculator: Estimates the carat weight of diamonds based on their cut (shapes such as Princess), dimensions and the specific gravity of diamonds.
2. Gem Carat Weight Calculator: Estimates the carat weight of a gem based on its shape, dimensions and the type of gem (e.g. ruby).  The type of gem is used to look up the specific gravity of the gem which is combined with the approximate volumetric size to compute the carat weight.
3. Precious Metals Calculator: Eight (8) functions to compute the price a Jeweler can reasonably pay for items for their value in Gold, Platinum, Palladium and Silver.  Silver includes silver alloy, junk silver and clad silver.
4. Jewelers Calculator: All the functions associated with carat weight estimates of diamonds and other gemstones, and the functions for estimating the value of precious metals (gold, platinum, palladium and silver). In essence, it's the three calculators above combined into one page.
5. Precious Metal Purchase Power Calculator: Functions to compute the amount of gold, platinum, palladium or silver one could buy with an amount of money based on the current spot price of the precious metal and a reasonable retailers markup above SPOT.
6. Silver Calculator: Six functions to compute the value of different classes of silver (fine, junk, clad) and four data values for the current SPOT price of silver and percent purity of sterling and fine silver.

Equations (48)

1. Baguette Cut Diamond Weight: Computes the approximate carat weight of a baguette cut diamond based on the vertical and horizontal widths, and the depth.
2. Beads in a Bracelet: Computes the number of beads in a bracelet based on the length of the bracelet and the width of the beads.
3. Beads in a Necklace: Computes the number of beads in a necklace based on the length of the necklace and the width of the beads.
4. Cabochon Cut Gem Weight: Estimates the carat weight of a cabochon gem based on the dimensions, a cabochon factor, bulge and gem type.
5. Carat Weight of a Cabochon Adventurine Quartz: Estimates the carat weight based on the specific gravity of Adventurine Quartz and its dimensions including a cabochon factor. 
6. Carat Weight of a Cabochon Chalcedony: Estimates the carat weight based on the specific gravity of Chalcedony and its dimensions including a cabochon factor.
7. Carat Weight of a Cabochon Emerald: Estimates the carat weight based on the specific gravity of emerald and its dimensions including a cabochon factor. 
8. Carat Weight of an Jadeite Jade Cabochon: Estimates the carat weight based on the specific gravity of Jadeite Jade and its dimensions including a cabochon factor.
9. Carat Weight of an Nephrite Jade Cabochon: Estimates the carat weight based on the specific gravity of Nephrite Jade and its dimensions including a cabochon factor.
10. Carat Weight of an Opal Cabochon: Estimates the carat weight based on the specific gravity of opal and its dimensions including a cabochon factor.
11. Carat Weight of a Cabochon Ruby: Estimates the carat weight based on the specific gravity of ruby and its dimensions including a cabochon factor.
12. Carat Weight of a Cabochon Sapphire: Estimates the carat weight based on the specific gravity of opal and its dimensions including a cabochon factor.
13. Carat Weight of a Cabochon Tigers Eye: Estimates the carat weight based on the specific gravity of Tigers Eye and its dimensions including a cabochon factor.
14. Carat Weight of a Cats Eye Cabochon Estimates the carat weight based on the specific gravity of the gem and its dimensions including a cabochon factor. 
15. Cost of Engagement Ring: Calculates how much should be spent on an engagement ring based on annual income.
16. Cushion Diamond Cut Weight: Estimates the carat weight of a cushion cut diamond based on the average diameter (vertical and horizontal can be entered in case the diamond face isn't precisely symmetrical), depth and girdle thickness factor.
17. Cushion Faceted Gem Weight: Computes the approximate carat weight of a square or rectangular Cushion Faceted gemstone (e.g., Ruby).
18. Emerald Cut Diamond Weight: Computes the approximate carat weight of an Emerald Cut shaped diamond based on the vertical and horizontal widths, the depth and a girdle thickness factor.
19. Emerald Cut Faceted Gem Weight: Computes the approximate carat weight of an Emerald Cut Faceted gemstone (e.g., Ruby).
20. Gold Buy Price: Computes the Jeweler's Buy Price for gold based on the current value of gold, the karat purity, a scrap processing fee, and the jeweler's profit margin.
21. Heart Shape Faceted Gem Weight: Computes the approximate carat weight of an Heart Shape Faceted gemstone (e.g., Ruby).
22. Heart Shaped Diamond Weight: Estimates the weight of a heart shaped diamond based on the average diameter (vertical and horizontal), depth and a girdle thickness factor.
23. How Much Gold I Can Buy: Computes the weight of gold one can buy based on the amount of money one has, the current price of gold and a reasonable retailer markup.
24. How Much Palladium I Can Buy: Computes the weight of palladium one can buy based on the amount of money one has, the current price of palladium and a reasonable retailer markup.
25. How Much Platinum I Can Buy: Computes the weight of platinum one can buy based on the amount of money one has, the current price of platinum and a reasonable retailer markup.
26. How Much Silver I Can Buy: Computes the weight of silver one can buy based on the amount of money one has, a reasonable retailer markup and the current price of silver.
27. Karat to Percentage: Computes the percentage associates with a karat value.
28. Long Rectangular Cut Gem Weight: Computes the approximate carat weight of a Long Rectangular Cut Faceted gemstones (e.g. Ruby).
29. Lozenge Faceted Gem Weight: Estimates the carat weight of a Lozenge Faceted gemstone (e.g., Amethyst) based on the gem's specific gravity and dimensions.
30. Marquise Brilliant Diamond Weight: Estimates the carat weight of a Marquise Brilliant shaped diamond based on the vertical and horizontal widths, the depth and a girdle thickness.
31. Marquise Faceted Gem Weight: Computes the approximate carat weight of a Marquise Faceted gemstone (e.g., Diamond, Ruby or Emerald) based on the gem's specific gravity and dimensions including a bulge factor.
32. Navette or Boat-shaped Gem Weight: Computes the approximate carat weight of a Navette or Boat-shaped gemstone (e.g., Diamond, Ruby or Emerald) based on the gem's specific gravity and dimensions including a bulge factor.
33. Old European Cut Diamond Weight: Computes the approximate carat weight of a Old European cut diamond based on the average diameter, depth and girdle thickness factor.
34. Oval Brilliant Diamond Weight: Computes the approximate carat weight of an oval brilliant shaped diamond using the length, width, and depth of the diamond and a girdle thickness factor.
35. Oval Faceted Gem Weight: Computes the approximate carat weight of an Oval Faceted colored stone (e.g. Ruby).based on the gem's specific gravity and dimensions including a bulge factor.
36. Palladium Buy Price:  Computes the Jeweler's Buy Price for palladium based on the current value of palladium, the percent purity, a scrap processing fee, and the jeweler's profit margin.
37. Pear or Teardrop Gem Weight: Computes the approximate carat weight of a Pear or Teardrop-shaped gem based on its dimensions and type of gem (e.g. ruby).
38. Pear Shaped Diamond Weight: Computes the approximate carat weight of a Pear-shaped (teardrop shaped) brilliant diamond based on the vertical and horizontal widths, the depth and a girdle thickness factor.
39. Precious Metal Buy Price: Computes the Jeweler's Buy Price for gold, platinum, palladium or silver based on the current value of a precious metal, the metal's purity, a scrap processing fee, and the jeweler's profit margin.
40. Princess Cut Diamond Weight: Computes the approximate carat weight of a princess cut diamond based on the dimensions.
41. Round Brilliant Diamond Weight: Computes the approximate carat weight of a round brilliant shaped diamond based on the average diameter (vertical and horizontal can be entered in case the diamond face isn't precisely circular), depth and girdle thickness factor.
42. Round Faceted Gem Weight Computes the approximate carat weight of a Round Faceted -shaped gem based on its dimensions and type of gem (e.g. ruby).
43. Gem Specific Gravity: Provides the specific gravity of various gems and minerals.
44. Ring Size: Computes the inner diameter of the ring that would best fit one's finger and the ring size. 
45. Square Cut Faceted Gem Weight: Computes the approximate carat weight of a Square Cut Faceted colored stone (e.g. Ruby).
46. Tapered Baguette Diamond Weight: Computes the approximate weight of a tapered baguette shaped (cut) diamond based on the top and bottom horizontal widths, the length and the depth.
47. Triangular Brilliant Diamond Weight: Computes the approximate carat weight of a triangular brilliant diamond based on the vertical and horizontal widths, the depth and a girdle thickness factor.
48. Weight Correction for a Diamond: Computes the approximate weight adjustment in a percentage for diamonds based on mean diameter of the diamond and girdle thickness.

Data Items (8)

1. Gold SPOT ($/g): Gold SPOT price in dollars per gram.
2. Gold SPOT ($/Oz): Gold SPOT price in dollars per troy ounce.
3. Palladium SPOT ($/g): Palladium SPOT price in dollars per gram.
4. Palladium SPOT ($/Oz): Palladium SPOT price in dollars per troy ounce.
5. Platinum SPOT ($/g): Platinum SPOT price in dollars per gram.
6. Platinum SPOT ($/Oz): Platinum SPOT price in dollars per troy ounce.
7. Silver SPOT ($/g): Silver SPOT price in dollars per gram.
8. Silver Spot ($/Oz): Silver SPOT price in dollars per troy ounce.

Datasets (2)

1. gem specific gravity: table contains a list of the most common gems (see gem list below), by name and their specific gravity, which is a mean density ratio compared to the density of pure water.
2. Ring Size: Table of diameters, circumference and ring sizes in millimeters and inches.

WikiClips (7)

1. Cabochon Gem Weight Calculator List
2. Diamond Weight Calculator Information
3. Gem List
4. Gem Weight Estimation Calculator Info
5. Gemology Accuracy Information: Test results between vCalc carat weight library and industry standard software
6. Gemstone List Table
7. Ring Size Chart

UIDs