Indium Element Number 49 In 

300 grams of pure Indium, Indium can be scratched with your finger nail. This bar could easily be cut in half with a steak knife,  and melted on the stove top (not suggested) 

In 49  AW:114.818  D:7.31  MP:313.8  BP:3762  Mohs:1.2 

Indium is one of my favorite metals, because of some of the cool traits it has. Indium is a rare (61st most abundant) silvery metal that sort feels like lead to the touch. Indium is so soft you can cut through thick pieces with an ordinary knife. Indium makes a creaking, crackly noise if is bent, and Indium sticks are sometimes referred to as a "cry".

 Indium melts at fairly low temperature and this makes the metal fun to cast and experiment with alloying. I have made Bismuth crystals that are white, due to slight Indium contamination. Bismuth rarely forms decent crystals when contaminated. The crystals I made from the Bi-In are not as defined as pure Bi crystals but very pretty.

Indium has become important in LCD screens and "touch screens". Indium is also used in other electronics, as heat sinks, solders and alloys, semi conductors, LEDs and vapor lamp components.

Indium is a scarce element which could potentially become far more expensive as supplies fall behind demand. Indium can be recycled and recycling is a large source of Indium. Indium is generally a byproduct of Zinc refining.

 Indium is produced in stars with 1-10 times mass of our sun, in the slow s-process.

Indium can be used in nuclear medicine, as a gamma emitter for imaging.  In nuclear reactors Indium can be used as a neutron control. generally alloyed with Cadmium and Silver. indium has been used as bearing lubricating metal, and low temp alloys. One alloy of indium "Galistan" is liquid at -2F, that's really cool.

Tin Element Number 50 Sn 

 8.5Lbs. of pure Tin in various shapes, Tin is easy to recast right on the stove top, (not suggested). Tin can have an almost mirror finish as it is very shiny metal.

Sn  50  AW:118.710  D:7.36  MP:449  BP:4716  Mohs:1.5 

 Tin is element number 50 on the Periodic Table, and ranks 50th in abundance in the crust of the Earth, in nuclear physics 50 is a "magic" number. Tin has been used for thousands of years, as it is a component of bronze. Pure tin was first produced around 600 BC. Tin played an important roll in advancement of civilizations, the "ages of man" brought forth mining and smelting, production of metal tools and materials. These materials changed the way people worked, farmed and lived. Bronze spread through the ancient world, it changed forever the way we lived. Tin and Copper alloy brought new farming tools, bringing prosperity, and urbanization.

Tin is a soft shiny metal with a low melting point, making it useful in industry and decor. Like Indium, Tin makes noise when a stick or rod is bent, it sounds sorta like crackling The term Tin roof or Tin can, refers to coatings of Tin to prevent corrosion, as Tin is very resistant to corrosion. These days many items are coated with Zinc, or for canning plastic is used as a coating, as Tin is somewhat expensive.

Tin is easy to melt and cast, and many people used to cast their own toys from Tin at home. Some toy companies back in the day sold casting kits for Tin, and also Lead toy casting

The main use of Tin is in solders and alloys, and coatings. Tin is used with Lead to make solders for plumbing and electrical components. Because of the toxic nature of Lead, solders are changing to other Tin alloys

Pewter is a well known common alloy of Tin used in many decorative applications. A lesser  known alloy of Tin and Niobium, used for superconducting magnets. A Zirconium - Tin alloy is used for fuel rod cladding in reactors.

Tin has 4 allotrope, one of which has few if any uses, and 2 that exist in extreme conditions. Tin also has 10 stable Isotopes, the most of any element. Tin also holds a "double magic" nuclide isotope Sn100.

Tin is created in medium stars by the s-process.

Tin has other uses, in glass manufacture, pesticides,  PVC stabilization, dental material, and chemistry. Tin certainly is one of the notable elements to civilization and mankind.