The crystal glasses have become milky due to a process called etching. Etching occurs when the surface of the glass is eroded by the combination of alkaline dishwashing detergents and hot water, which can create a cloudy or milky appearance on the glass. This can also happen when the glasses are washed in hard water, which contains high levels of minerals that can leave a film on the glass. To prevent this, it is important to use a gentle, non-abrasive detergent and avoid washing the glasses in very hot water. **

The crystal green-transparent-milky stripe you are describing could be a variety of minerals, but one possibility is fluorite. Fluorite is a colorful mineral that can range from green to purple, and it often has transparent or milky stripes running through it. It is commonly used in jewelry and as a decorative stone. Another possibility is apatite, which can also exhibit similar green and transparent milky qualities. Both minerals are known for their vibrant colors and unique crystal formations. **

Some ideas for product design include incorporating sustainable materials and practices, focusing on user experience and usability, creating products that are customizable or modular to adapt to different needs, and incorporating innovative technology such as IoT or AI. Additionally, designing products that are aesthetically pleasing and visually appealing can also enhance their marketability and user satisfaction. It is important to consider the target audience, market trends, and functionality when brainstorming ideas for product design. **

One can study product design by enrolling in a formal education program such as a bachelor's or master's degree in industrial design, product design, or a related field. These programs typically cover topics such as design principles, materials and manufacturing processes, user research, and prototyping. Additionally, individuals can also learn product design through online courses, workshops, and self-study, by practicing design skills, and by seeking mentorship or internships in the industry. It's also important to stay updated on current design trends and technologies to excel in the field of product design. **

One can study product design at a variety of institutions including art and design schools, universities, and technical colleges. Many of these institutions offer specialized programs in product design, industrial design, or related fields. Additionally, there are online courses and workshops available for those looking to study product design remotely. It's important to research and choose a program that aligns with your career goals and interests. **

Yes, Ikea does buy product design ideas. The company often collaborates with independent designers and design firms to create new products for their collections. They also have a program called "Democratic Design Days" where they invite designers to pitch their ideas for potential collaboration. Additionally, Ikea has been known to acquire design patents and licenses for innovative product designs. **

Yes, "Pokemon Crystal" is a popular game that many people enjoy playing. It offers a nostalgic experience for those who grew up playing it and also appeals to new players who are interested in classic Pokemon games. The game's unique features, such as the ability to play as a female character and the introduction of the Battle Tower, make it a favorite among fans. Overall, the enduring popularity of "Pokemon Crystal" makes it a game that many players are happy to revisit time and time again. **

A real crystal differs from an ideal crystal in several ways. Real crystals may contain impurities or defects in their atomic structure, which can affect their physical properties such as color, clarity, and hardness. Ideal crystals have a perfect, repeating atomic structure with no imperfections, while real crystals may have irregularities that make them unique. Additionally, real crystals may exhibit variations in their growth patterns and shapes, whereas ideal crystals would have uniform characteristics. **