Big Cathedral Alligator Quartz Rare Smoky Crystal Point Specimen. Conversion : 1mm=0.039 inch, 1inch=25.4 mm, 1LB=453.59 grams. Sharp and fragile products, pay attention to your safety! Please consider the size and weight given in the listing as the pictures are generally enlarged to show detail.The pictured is the exact one you will receive. Color may very slightly due to the color calibration of each individual monitor! Please consider the actual sizes given in the listing as the pictures are generally enlarged to show detail. Thank you for your understanding. We will answer all emails within 24 to 48 hours. If you want to order something, please tell us your specification in details. We will try our best to meet you expectation.