They do only randomly choose without considering and determining the quality, so it will easily broke or it will not last for a long period of time.
Then how can you buy top-notch crystal diamonds? You can choose from beef, chicken, turkey, or duck in this. https://Www.pressadvantage.com/story/61285-fleet-management-consulting-firm-helps-heavy-equipment-companies-manage-their-fleet-of-vehicles